Branch data Line data Source code
1 : : // Copyright (c) 2015-present The Bitcoin Core developers
2 : : // Distributed under the MIT software license, see the accompanying
3 : : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 : :
5 : : #include <bitcoin-build-config.h> // IWYU pragma: keep
6 : :
7 : : #include <httpserver.h>
8 : :
9 : : #include <chainparamsbase.h>
10 : : #include <common/args.h>
11 : : #include <common/messages.h>
12 : : #include <common/url.h>
13 : : #include <compat/compat.h>
14 : : #include <logging.h>
15 : : #include <netbase.h>
16 : : #include <node/interface_ui.h>
17 : : #include <rpc/protocol.h>
18 : : #include <span.h>
19 : : #include <sync.h>
20 : : #include <util/check.h>
21 : : #include <util/signalinterrupt.h>
22 : : #include <util/sock.h>
23 : : #include <util/strencodings.h>
24 : : #include <util/thread.h>
25 : : #include <util/threadnames.h>
26 : : #include <util/threadpool.h>
27 : : #include <util/time.h>
28 : : #include <util/translation.h>
29 : :
30 : : #include <condition_variable>
31 : : #include <cstdio>
32 : : #include <cstdlib>
33 : : #include <memory>
34 : : #include <optional>
35 : : #include <span>
36 : : #include <string>
37 : : #include <string_view>
38 : : #include <thread>
39 : : #include <unordered_map>
40 : : #include <vector>
41 : :
42 : : #include <sys/types.h>
43 : : #include <sys/stat.h>
44 : :
45 : : //! The set of sockets cannot be modified while waiting, so
46 : : //! the sleep time needs to be small to avoid new sockets stalling.
47 : : static constexpr auto SELECT_TIMEOUT{50ms};
48 : :
49 : : //! Explicit alias for setting socket option methods.
50 : : static constexpr int SOCKET_OPTION_TRUE{1};
51 : :
52 : : using common::InvalidPortErrMsg;
53 : : using util::LineReader;
54 : : using namespace bitcoin_http;
55 : :
56 : 0 : struct HTTPPathHandler
57 : : {
58 : 0 : HTTPPathHandler(std::string _prefix, bool _exactMatch, HTTPRequestHandler _handler):
59 [ # # # # ]: 0 : prefix(_prefix), exactMatch(_exactMatch), handler(_handler)
60 : : {
61 : 0 : }
62 : : std::string prefix;
63 : : bool exactMatch;
64 : : HTTPRequestHandler handler;
65 : : };
66 : :
67 : : /** HTTP module state */
68 : :
69 : : static std::unique_ptr<HTTPServer> g_http_server{nullptr};
70 : : //! Handlers for (sub)paths
71 : : static GlobalMutex g_httppathhandlers_mutex;
72 : : static std::vector<HTTPPathHandler> pathHandlers GUARDED_BY(g_httppathhandlers_mutex);
73 : : /// \anchor http_pool
74 : : //! Http thread pool - future: encapsulate in HttpContext
75 : : static ThreadPool g_threadpool_http("http");
76 : : static int g_max_queue_depth{100};
77 : :
78 : : /** Check if a network address is allowed to access the HTTP server */
79 : 0 : bool HTTPServer::ClientAllowed(const CNetAddr& netaddr) const
80 : : {
81 [ # # ]: 0 : if (!netaddr.IsValid())
82 : : return false;
83 [ # # ]: 0 : for(const CSubNet& subnet : m_allow_subnets)
84 [ # # ]: 0 : if (subnet.Match(netaddr))
85 : : return true;
86 : : return false;
87 : : }
88 : :
89 : : /** Initialize ACL list for HTTP server */
90 : 0 : bool HTTPServer::InitHTTPAllowList()
91 : : {
92 : : // Must be run before StartSocketThreads() because ThreadSocketHandler()
93 : : // will check m_allow_subnets from the I/O thread.
94 [ # # ]: 0 : Assume(!m_thread_socket_handler.joinable());
95 : :
96 : 0 : m_allow_subnets.clear();
97 [ # # # # : 0 : m_allow_subnets.emplace_back(LookupHost("127.0.0.1", false).value(), 8); // always allow IPv4 local subnet
# # ]
98 [ # # # # : 0 : m_allow_subnets.emplace_back(LookupHost("::1", false).value()); // always allow IPv6 localhost
# # ]
99 [ # # # # ]: 0 : for (const std::string& strAllow : gArgs.GetArgs("-rpcallowip")) {
100 [ # # ]: 0 : const CSubNet subnet{LookupSubNet(strAllow)};
101 [ # # # # ]: 0 : if (!subnet.IsValid()) {
102 [ # # ]: 0 : uiInterface.ThreadSafeMessageBox(
103 [ # # ]: 0 : Untranslated(strprintf("Invalid -rpcallowip subnet specification: %s. Valid values are a single IP (e.g. 1.2.3.4), a network/netmask (e.g. 1.2.3.4/255.255.255.0), a network/CIDR (e.g. 1.2.3.4/24), all ipv4 (0.0.0.0/0), or all ipv6 (::/0). RFC4193 is allowed only if -cjdnsreachable=0.", strAllow)),
104 [ # # ]: 0 : CClientUIInterface::MSG_ERROR);
105 : 0 : return false;
106 : : }
107 [ # # ]: 0 : m_allow_subnets.push_back(subnet);
108 : 0 : }
109 : 0 : std::string strAllowed;
110 [ # # ]: 0 : for (const CSubNet& subnet : m_allow_subnets)
111 [ # # # # ]: 0 : strAllowed += subnet.ToString() + " ";
112 [ # # # # : 0 : LogDebug(BCLog::HTTP, "Allowing HTTP connections from: %s\n", strAllowed);
# # ]
113 : 0 : return true;
114 : 0 : }
115 : :
116 : : /** HTTP request method as string - use for logging only */
117 : 94 : std::string_view RequestMethodString(HTTPRequestMethod m)
118 : : {
119 [ + - + - : 94 : switch (m) {
+ - ]
120 : 3 : using enum HTTPRequestMethod;
121 : 3 : case GET: return "GET";
122 : 0 : case POST: return "POST";
123 : 1 : case HEAD: return "HEAD";
124 : 0 : case PUT: return "PUT";
125 : 90 : case UNKNOWN: return "unknown";
126 : : } // no default case, so the compiler can warn about missing cases
127 : 0 : assert(false);
128 : : }
129 : :
130 : 0 : static void WriteNoStoreErrorReply(HTTPRequest& req, HTTPStatusCode status, std::string_view reply = {})
131 : : {
132 [ # # # # ]: 0 : req.WriteHeader("Cache-Control", "no-store");
133 : 0 : req.WriteReply(status, reply);
134 : 0 : }
135 : :
136 : 0 : static void MaybeDispatchRequestToWorker(std::shared_ptr<HTTPRequest> hreq)
137 : : {
138 : : // Early reject unknown HTTP methods
139 [ # # ]: 0 : if (hreq->GetRequestMethod() == HTTPRequestMethod::UNKNOWN) {
140 [ # # # # : 0 : LogDebug(BCLog::HTTP, "HTTP request from %s rejected: Unknown HTTP request method\n",
# # ]
141 : : hreq->GetPeer().ToStringAddrPort());
142 : 0 : WriteNoStoreErrorReply(*hreq, HTTP_BAD_METHOD);
143 : 0 : return;
144 : : }
145 : :
146 : : // Find registered handler for prefix
147 [ # # ]: 0 : std::string strURI = hreq->GetURI();
148 [ # # ]: 0 : std::string path;
149 [ # # ]: 0 : LOCK(g_httppathhandlers_mutex);
150 : 0 : std::vector<HTTPPathHandler>::const_iterator i = pathHandlers.begin();
151 : 0 : std::vector<HTTPPathHandler>::const_iterator iend = pathHandlers.end();
152 [ # # ]: 0 : for (; i != iend; ++i) {
153 : 0 : bool match = false;
154 [ # # ]: 0 : if (i->exactMatch)
155 : 0 : match = (strURI == i->prefix);
156 : : else
157 [ # # # # ]: 0 : match = strURI.starts_with(i->prefix);
158 [ # # ]: 0 : if (match) {
159 [ # # # # ]: 0 : path = strURI.substr(i->prefix.size());
160 : 0 : break;
161 : : }
162 : : }
163 : :
164 : : // Dispatch to worker thread
165 [ # # ]: 0 : if (i != iend) {
166 [ # # # # ]: 0 : if (static_cast<int>(g_threadpool_http.WorkQueueSize()) >= g_max_queue_depth) {
167 [ # # ]: 0 : LogWarning("Request rejected because http work queue depth exceeded, it can be increased with the -rpcworkqueue= setting");
168 [ # # ]: 0 : WriteNoStoreErrorReply(*hreq, HTTP_SERVICE_UNAVAILABLE, "Work queue depth exceeded");
169 : : return;
170 : : }
171 : :
172 [ # # ]: 0 : auto item = [req = hreq, in_path = std::move(path), fn = i->handler]() {
173 [ # # ]: 0 : std::string err_msg;
174 : 0 : try {
175 [ # # ]: 0 : fn(req.get(), in_path);
176 : 0 : return;
177 [ - - ]: 0 : } catch (const std::exception& e) {
178 [ - - - - ]: 0 : LogWarning("Unexpected error while processing request for '%s'. Error msg: '%s'", req->GetURI(), e.what());
179 [ - - ]: 0 : err_msg = e.what();
180 : 0 : } catch (...) {
181 [ - - - - ]: 0 : LogWarning("Unknown error while processing request for '%s'", req->GetURI());
182 [ - - ]: 0 : err_msg = "unknown error";
183 [ - - ]: 0 : }
184 : : // Reply so the client doesn't hang waiting for the response.
185 [ - - - - : 0 : req->WriteHeader("Connection", "close");
- - ]
186 : : // TODO: Implement specific error formatting for the REST and JSON-RPC servers responses.
187 [ - - - - ]: 0 : WriteNoStoreErrorReply(*req, HTTP_INTERNAL_SERVER_ERROR, err_msg);
188 [ # # ]: 0 : };
189 : :
190 [ # # ]: 0 : if (auto res = g_threadpool_http.Submit(std::move(item)); !res.has_value()) {
191 [ # # ]: 0 : Assume(hreq.use_count() == 1); // ensure request will be deleted
192 : : // Both SubmitError::Inactive and SubmitError::Interrupted mean shutdown
193 [ # # ]: 0 : LogWarning("HTTP request rejected during server shutdown: '%s'", SubmitErrorString(res.error()));
194 [ # # ]: 0 : WriteNoStoreErrorReply(*hreq, HTTP_SERVICE_UNAVAILABLE, "Request rejected during server shutdown");
195 : 0 : return;
196 : 0 : }
197 : 0 : } else {
198 [ # # ]: 0 : WriteNoStoreErrorReply(*hreq, HTTP_NOT_FOUND);
199 : : }
200 : 0 : }
201 : :
202 : 0 : static void RejectRequest(std::unique_ptr<HTTPRequest> hreq)
203 : : {
204 [ # # ]: 0 : LogDebug(BCLog::HTTP, "Rejecting request while shutting down");
205 : 0 : WriteNoStoreErrorReply(*hreq, HTTP_SERVICE_UNAVAILABLE);
206 : 0 : }
207 : :
208 : 0 : static std::vector<std::pair<std::string, uint16_t>> GetBindAddresses()
209 : : {
210 : 0 : uint16_t http_port{static_cast<uint16_t>(gArgs.GetIntArg("-rpcport", BaseParams().RPCPort()))};
211 : 0 : std::vector<std::pair<std::string, uint16_t>> endpoints;
212 : :
213 : : // Determine what addresses to bind to
214 : : // To prevent misconfiguration and accidental exposure of the RPC
215 : : // interface, require -rpcallowip and -rpcbind to both be specified
216 : : // together. If either is missing, ignore both values, bind to localhost
217 : : // instead, and log warnings.
218 : 0 : if (gArgs.GetArgs("-rpcallowip").empty() || gArgs.GetArgs("-rpcbind").empty()) { // Default to loopback if not allowing external IPs
[ # # # #
# # # # #
# # # # #
# # # # #
# # # ]
219 [ # # ]: 0 : endpoints.emplace_back("::1", http_port);
220 [ # # ]: 0 : endpoints.emplace_back("127.0.0.1", http_port);
221 [ # # # # : 0 : if (!gArgs.GetArgs("-rpcallowip").empty()) {
# # ]
222 [ # # ]: 0 : LogWarning("Option -rpcallowip was specified without -rpcbind; this doesn't usually make sense");
223 : : }
224 [ # # # # : 0 : if (!gArgs.GetArgs("-rpcbind").empty()) {
# # ]
225 [ # # ]: 0 : LogWarning("Option -rpcbind was ignored because -rpcallowip was not specified, refusing to allow everyone to connect");
226 : : }
227 : : } else { // Specific bind addresses
228 [ # # # # : 0 : for (const std::string& strRPCBind : gArgs.GetArgs("-rpcbind")) {
# # ]
229 : 0 : uint16_t port{http_port};
230 [ # # ]: 0 : std::string host;
231 [ # # # # : 0 : if (!SplitHostPort(strRPCBind, port, host)) {
# # ]
232 [ # # # # : 0 : LogError("%s\n", InvalidPortErrMsg("-rpcbind", strRPCBind).original);
# # ]
233 : 0 : return {}; // empty
234 : : }
235 [ # # ]: 0 : endpoints.emplace_back(host, port);
236 : 0 : }
237 : : }
238 : 0 : return endpoints;
239 : 0 : }
240 : :
241 : 0 : void RegisterHTTPHandler(const std::string &prefix, bool exactMatch, const HTTPRequestHandler &handler)
242 : : {
243 [ # # ]: 0 : LogDebug(BCLog::HTTP, "Registering HTTP handler for %s (exactmatch %d)\n", prefix, exactMatch);
244 : 0 : LOCK(g_httppathhandlers_mutex);
245 [ # # ]: 0 : pathHandlers.emplace_back(prefix, exactMatch, handler);
246 : 0 : }
247 : :
248 : 0 : void UnregisterHTTPHandler(const std::string &prefix, bool exactMatch)
249 : : {
250 : 0 : LOCK(g_httppathhandlers_mutex);
251 : 0 : std::vector<HTTPPathHandler>::iterator i = pathHandlers.begin();
252 : 0 : std::vector<HTTPPathHandler>::iterator iend = pathHandlers.end();
253 [ # # ]: 0 : for (; i != iend; ++i)
254 [ # # # # ]: 0 : if (i->prefix == prefix && i->exactMatch == exactMatch)
255 : : break;
256 [ # # ]: 0 : if (i != iend)
257 : : {
258 [ # # # # : 0 : LogDebug(BCLog::HTTP, "Unregistering HTTP handler for %s (exactmatch %d)\n", prefix, exactMatch);
# # ]
259 : 0 : pathHandlers.erase(i);
260 : : }
261 : 0 : }
262 : :
263 : : using util::Split;
264 : :
265 : 580 : std::optional<std::string> HTTPHeaders::FindFirst(const std::string_view key) const
266 : : {
267 [ + + ]: 19437 : for (const auto& item : m_headers) {
268 [ - + + + ]: 18917 : if (CaseInsensitiveEqual(key, item.first)) {
269 [ - + ]: 120 : return item.second;
270 : : }
271 : : }
272 : 520 : return std::nullopt;
273 : : }
274 : :
275 : 110 : std::vector<std::string_view> HTTPHeaders::FindAll(const std::string_view key) const
276 : : {
277 : 110 : std::vector<std::string_view> ret;
278 [ + + ]: 3671 : for (const auto& item : m_headers) {
279 [ - + + - : 3561 : if (CaseInsensitiveEqual(key, item.first)) {
+ + ]
280 [ - + + - ]: 3561 : ret.push_back(item.second);
281 : : }
282 : : }
283 : 110 : return ret;
284 : 0 : }
285 : :
286 : 5814 : void HTTPHeaders::Write(std::string&& key, std::string&& value)
287 : : {
288 : 5814 : m_headers.emplace_back(std::move(key), std::move(value));
289 : 5814 : }
290 : :
291 : 0 : void HTTPHeaders::RemoveAll(std::string_view key)
292 : : {
293 : 0 : auto moved = std::ranges::remove_if(m_headers, [key] (auto& pair) {
294 [ # # ]: 0 : return CaseInsensitiveEqual(key, pair.first);
295 : : });
296 : 0 : m_headers.erase(moved.begin(), moved.end());
297 : 0 : }
298 : :
299 : 167 : bool HTTPHeaders::Read(util::LineReader& reader, bool write)
300 : : {
301 : : // Headers https://httpwg.org/specs/rfc9110.html#rfc.section.6.3
302 : : // A sequence of Field Lines https://httpwg.org/specs/rfc9110.html#rfc.section.5.2
303 : 167 : size_t start{reader.Consumed()};
304 [ + + ]: 5887 : while (auto maybe_line = reader.ReadLine()) {
305 [ - + - - ]: 5865 : if (reader.Consumed() - start + m_consumed > MAX_HEADERS_SIZE) throw std::runtime_error("HTTP headers exceed size limit");
306 : :
307 [ + + ]: 5865 : const std::string_view& line = *maybe_line;
308 : :
309 : : // An empty line indicates end of the headers section https://www.rfc-editor.org/rfc/rfc2616#section-4
310 [ + + ]: 5865 : if (line.empty()) {
311 : : // Ensure all headers are accounted for in case there is a chunked trailer
312 : 110 : m_consumed += reader.Consumed() - start;
313 : 110 : return true;
314 : : }
315 : :
316 : : // "Field values containing CR, LF, or NUL characters are invalid and dangerous"
317 : : // https://httpwg.org/specs/rfc9110.html#rfc.section.5.5
318 : : // A sender MUST NOT generate a bare CR (a CR character not immediately followed by LF)
319 : : // within any protocol elements other than the content.
320 : : // A recipient of such a bare CR MUST consider that element to be invalid...
321 : : // https://httpwg.org/specs/rfc9112.html#rfc.section.2.2
322 [ + + + - ]: 5755 : if (line.find_first_of("\r\n\0", 0, 3) != std::string_view::npos) throw std::runtime_error("Header contains invalid character");
323 : :
324 : : // Header line must have at least one ":"
325 : : // keys are not allowed to have delimiters like ":" but values are
326 : : // https://httpwg.org/specs/rfc9110.html#rfc.section.5.6.2
327 : 5749 : const size_t pos{line.find(':')};
328 [ + + + - ]: 5749 : if (pos == std::string_view::npos) throw std::runtime_error("HTTP header missing colon (:)");
329 : :
330 : : // Whitespace is strictly not allowed in the field-name (key)
331 : : // https://www.rfc-editor.org/rfc/rfc9110.html#section-5.6.2
332 : 5741 : std::string_view key = line.substr(0, pos);
333 [ + + + - ]: 5741 : if (key.find_first_of(" \t\n\r\f\v") != std::string_view::npos) throw std::runtime_error("Invalid header field-name contains whitespace");
334 : : // Whitespace is optional in the value and can be trimmed
335 : 5738 : std::string value = util::TrimString(std::string_view(line).substr(pos + 1));
336 : :
337 : : // Header keys are Field Names: https://httpwg.org/specs/rfc9110.html#fields.names
338 : : // which consist of "tokens": https://httpwg.org/specs/rfc9110.html#rfc.section.5.6.2
339 : : // that can not be empty.
340 [ + + + - ]: 5738 : if (key.empty()) throw std::runtime_error("Empty HTTP header name");
341 : :
342 [ + - ]: 5720 : if (write) {
343 [ + - + - ]: 11440 : Write(std::string(key), std::move(value));
344 : : }
345 : 5720 : }
346 : :
347 : : // We have not received all the request headers yet.
348 : : // Keep track of how much data we have already consumed to enforce
349 : : // the total limit over multiple read operations.
350 : 22 : m_consumed += reader.Consumed() - start;
351 : :
352 : 22 : return false;
353 : : }
354 : :
355 : 0 : std::string HTTPHeaders::Stringify() const
356 : : {
357 : 0 : std::string out;
358 [ # # # # ]: 0 : for (const auto& [key, value] : m_headers) {
359 [ # # # # : 0 : out += key + ": " + value + "\r\n";
# # ]
360 : : }
361 : :
362 : : // Headers are terminated by an empty line
363 [ # # ]: 0 : out += "\r\n";
364 : :
365 : 0 : return out;
366 : 0 : }
367 : :
368 : 0 : std::string HTTPResponse::StringifyHeaders() const
369 : : {
370 : 0 : return strprintf("HTTP/%d.%d %d %s\r\n%s",
371 : 0 : version.major,
372 : 0 : version.minor,
373 : 0 : status,
374 : 0 : HTTPStatusReasonString(status),
375 [ # # ]: 0 : headers.Stringify());
376 : : }
377 : :
378 : 312 : bool HTTPRequest::LoadControlData(LineReader& reader)
379 : : {
380 : 312 : auto maybe_line = reader.ReadLine();
381 [ + + ]: 312 : if (!maybe_line) return false;
382 [ + + ]: 276 : const std::string_view& request_line = *maybe_line;
383 : :
384 : : // Request Line aka Control Data https://httpwg.org/specs/rfc9110.html#rfc.section.6.2
385 : : // Three words separated by spaces, terminated by \n or \r\n
386 [ + + + - ]: 276 : if (request_line.length() < MIN_REQUEST_LINE_LENGTH) throw std::runtime_error("HTTP request line too short");
387 : :
388 : : // NUL is not a valid tchar and would silently truncate
389 : : // C-string-based parsers rather than being rejected as malformed.
390 : : // tchar: https://www.rfc-editor.org/info/rfc7230/#section-3.2.6
391 [ + + + - ]: 270 : if (request_line.find('\0') != std::string_view::npos) throw std::runtime_error("Invalid request line contains NUL");
392 : :
393 : 263 : const std::vector<std::string_view> parts{Split<std::string_view>(request_line, " ")};
394 [ - + + + : 263 : if (parts.size() != 3) throw std::runtime_error("HTTP request line malformed");
+ - ]
395 : :
396 [ + + ]: 226 : if (parts[0] == "GET") {
397 : 6 : m_method = HTTPRequestMethod::GET;
398 [ + + ]: 220 : } else if (parts[0] == "POST") {
399 : 3 : m_method = HTTPRequestMethod::POST;
400 [ + + ]: 217 : } else if (parts[0] == "HEAD") {
401 : 2 : m_method = HTTPRequestMethod::HEAD;
402 [ + + ]: 215 : } else if (parts[0] == "PUT") {
403 : 3 : m_method = HTTPRequestMethod::PUT;
404 : : } else {
405 : 212 : m_method = HTTPRequestMethod::UNKNOWN;
406 : : }
407 : :
408 [ + - ]: 226 : m_target = parts[1];
409 : :
410 [ + + + - ]: 226 : if (parts[2].rfind("HTTP/") != 0) throw std::runtime_error("HTTP request line malformed");
411 : :
412 : : // Version is exactly two decimal digits separated by a decimal point
413 : : // https://httpwg.org/specs/rfc9110.html#rfc.section.2.5
414 [ + - + - ]: 216 : const std::vector<std::string_view> version_parts{Split<std::string_view>(parts[2].substr(5), ".")};
415 [ - + + + : 216 : if (version_parts.size() != 2) throw std::runtime_error("HTTP request line malformed");
+ - ]
416 [ + + + + : 203 : if (version_parts[0].size() != 1 || version_parts[1].size() != 1) throw std::runtime_error("HTTP bad version");
+ - ]
417 : 197 : auto major = ToIntegral<uint8_t>(version_parts[0]);
418 : 197 : auto minor = ToIntegral<uint8_t>(version_parts[1]);
419 [ + + + + : 197 : if (!major || !minor || major != 1 || minor > 9) throw std::runtime_error("HTTP bad version");
+ + + - +
- ]
420 : 167 : m_version.major = major.value();
421 : 167 : m_version.minor = minor.value();
422 : :
423 : 167 : return true;
424 : 216 : }
425 : :
426 : 167 : bool HTTPRequest::LoadHeaders(LineReader& reader)
427 : : {
428 : 167 : return m_headers.Read(reader);
429 : : }
430 : :
431 : 110 : bool HTTPRequest::LoadBody(LineReader& reader)
432 : : {
433 : : // https://httpwg.org/specs/rfc9112.html#message.body
434 : 110 : auto transfer_encoding_header = m_headers.FindFirst("Transfer-Encoding");
435 [ - + - - : 110 : if (transfer_encoding_header && ToLower(transfer_encoding_header.value()) == "chunked") {
- - - - -
+ ]
436 : : // Transfer-Encoding: https://datatracker.ietf.org/doc/html/rfc7230.html#section-3.3.1
437 : : // Chunked Transfer Coding: https://datatracker.ietf.org/doc/html/rfc7230.html#section-4.1
438 : : // see evhttp_handle_chunked_read() in libevent http.c
439 [ # # # # ]: 0 : while (reader.Remaining() > 0) {
440 [ # # ]: 0 : if (!m_chunk_size) {
441 [ # # ]: 0 : auto maybe_chunk_size = reader.ReadLine();
442 [ # # ]: 0 : if (!maybe_chunk_size) return false;
443 : :
444 : : // Allow (but ignore) Chunk Extensions
445 : : // See https://www.rfc-editor.org/rfc/rfc9112.html#name-chunk-extensions
446 [ # # ]: 0 : std::string_view chunk_size_noext{maybe_chunk_size.value()};
447 : 0 : const auto semicolon_pos = chunk_size_noext.find(';');
448 [ # # ]: 0 : if (semicolon_pos != chunk_size_noext.npos) {
449 : 0 : chunk_size_noext.remove_suffix(chunk_size_noext.size() - semicolon_pos);
450 : : }
451 : :
452 [ # # ]: 0 : m_chunk_size = ToIntegral<uint64_t>(util::TrimStringView(chunk_size_noext), /*base=*/16);
453 [ # # # # ]: 0 : if (!m_chunk_size) throw std::runtime_error("Cannot parse chunk length value");
454 : :
455 [ # # # # : 0 : if ((m_body.size() > MAX_BODY_SIZE) ||
# # ]
456 [ # # ]: 0 : (*m_chunk_size > MAX_BODY_SIZE - m_body.size()))
457 [ # # ]: 0 : throw ContentTooLargeError("Chunk will exceed max body size");
458 : : }
459 : :
460 : : // We either just read the chunk size, or we have it saved
461 : : // from a prior I/O loop iteration
462 [ # # ]: 0 : Assume(m_chunk_size);
463 : :
464 : : // Last chunk has size 0
465 [ # # ]: 0 : if (*m_chunk_size == 0) {
466 : : // Validate Chunked Trailer section, which is used for
467 : : // additional headers sent at the end of the message.
468 : : // Data consumed here is counted towards MAX_HEADERS_SIZE
469 : : // along with the headers we read in the beginning of the request.
470 : : // At this time we ignore and drop these data after validating.
471 : : // See https://httpwg.org/specs/rfc9112.html#rfc.section.7.1.2
472 [ # # ]: 0 : return m_headers.Read(reader, /*write=*/false);
473 : : }
474 : :
475 : : // We have not read the entire chunk from the buffer yet
476 [ # # ]: 0 : if (m_chunk_read < *m_chunk_size) {
477 : : // Get what we can from the buffer
478 [ # # ]: 0 : const uint64_t chunk_need{*m_chunk_size - m_chunk_read};
479 [ # # # # ]: 0 : const uint64_t buffer_has{std::min(chunk_need, static_cast<uint64_t>(reader.Remaining()))};
480 : :
481 : : // Pack [partial] chunk onto body and update state
482 [ # # # # ]: 0 : m_body += reader.ReadLength(buffer_has);
483 : 0 : m_chunk_read += buffer_has;
484 : : }
485 : :
486 : : // Even though every chunk size is explicitly declared,
487 : : // they are still terminated by a CRLF we don't need,
488 : : // just consume it here.
489 [ # # ]: 0 : if (m_chunk_read == *m_chunk_size) {
490 [ # # ]: 0 : auto crlf = reader.ReadLine();
491 [ # # ]: 0 : if (!crlf) {
492 : : // CRLF not found before end of buffer: it has not been received by our socket yet.
493 : : return false;
494 : : }
495 : : // CRLF was found but there was unexpected data after the chunk_sized chunk
496 [ # # # # ]: 0 : if (!crlf.value().empty()) throw std::runtime_error("Improperly terminated chunk");
497 : :
498 : : // Clear state for next chunk
499 [ # # ]: 0 : m_chunk_size.reset();
500 : 0 : m_chunk_read = 0;
501 : : }
502 : : }
503 : :
504 : : // We read all the chunks but never got the last chunk, wait for client to send more
505 : : return false;
506 : : } else {
507 : : // No Content-length or Transfer-Encoding header means no body, see libevent evhttp_get_body()
508 [ + - ]: 110 : auto content_length_values{m_headers.FindAll("Content-Length")};
509 [ + + ]: 110 : if (content_length_values.empty()) return true;
510 : :
511 : : // Duplicate Content-Length headers are allowed only if they all have the same value
512 : : // https://www.rfc-editor.org/rfc/rfc7230#section-3.3.3
513 : 17 : const auto& first_content_length_value{content_length_values[0]};
514 [ - + + + ]: 87 : for (size_t i = 1; i < content_length_values.size(); ++i) {
515 [ + + + - ]: 78 : if (content_length_values[i] != first_content_length_value) throw std::runtime_error("Differing Content-Length values");
516 : : }
517 : :
518 : 9 : const auto content_length{ToIntegral<uint64_t>(first_content_length_value)};
519 [ + + + - ]: 9 : if (!content_length) throw std::runtime_error("Cannot parse Content-Length value");
520 : :
521 [ - + - - ]: 2 : if (*content_length > MAX_BODY_SIZE) throw ContentTooLargeError("Max body size exceeded");
522 : :
523 : : // A large body may arrive over multiple I/O loop iterations. Copy
524 : : // whatever the buffer has now; m_body's size tracks our progress.
525 [ - + ]: 2 : const uint64_t body_need{*content_length - m_body.size()};
526 [ + - + + ]: 2 : const uint64_t buffer_has{std::min(body_need, static_cast<uint64_t>(reader.Remaining()))};
527 : :
528 : : // Pack [partial] body on and update state
529 [ + - + - ]: 2 : m_body += reader.ReadLength(buffer_has);
530 : :
531 [ - + ]: 2 : return m_body.size() == *content_length;
532 : 110 : }
533 : 95 : }
534 : :
535 : 0 : void HTTPRequest::WriteReply(HTTPStatusCode status, std::span<const std::byte> reply_body)
536 : : {
537 : 0 : HTTPResponse res;
538 : :
539 : : // Some response headers are determined in advance and stored in the request
540 : 0 : res.headers = std::move(m_response_headers);
541 : :
542 : : // Response version matches request version
543 : 0 : res.version = m_version;
544 : :
545 : : // Add response code
546 : 0 : res.status = status;
547 : :
548 : : // See libevent evhttp_response_needs_body()
549 : : // Response headers are different if no body is needed
550 : 0 : bool needs_body{status != HTTP_NO_CONTENT && (status < 100 || status >= 200)};
551 : 0 : bool needs_content_length{false};
552 : :
553 : 0 : bool keep_alive{false};
554 : :
555 : : // See libevent evhttp_make_header_response()
556 : : // Expected response headers depend on protocol version
557 [ # # ]: 0 : if (m_version.major == 1) {
558 : : // HTTP/1.0
559 [ # # ]: 0 : if (m_version.minor == 0) {
560 [ # # ]: 0 : auto connection_header{m_headers.FindFirst("Connection")};
561 [ # # # # : 0 : if (connection_header && ToLower(connection_header.value()) == "keep-alive") {
# # # # #
# ]
562 [ # # # # : 0 : res.headers.Write("Connection", "keep-alive");
# # ]
563 : 0 : keep_alive = true;
564 : : // HTTP/1.0 connections are closed by default so EOF is sufficient
565 : : // to indicate end of the body. Adding Content-Length a special case.
566 [ # # ]: 0 : if (needs_body) needs_content_length = true;
567 : : }
568 : 0 : }
569 : :
570 : : // HTTP/1.1
571 [ # # ]: 0 : if (m_version.minor >= 1) {
572 : 0 : const int64_t now_seconds{TicksSinceEpoch<std::chrono::seconds>(NodeClock::now())};
573 [ # # # # : 0 : res.headers.Write("Date", FormatRFC1123DateTime(now_seconds));
# # ]
574 : :
575 : : // HTTP/1.1 connections are kept alive by default and always require Content-Length.
576 [ # # ]: 0 : if (needs_body) needs_content_length = true;
577 : :
578 : : // Default for HTTP/1.1
579 : : keep_alive = true;
580 : : }
581 : : }
582 : :
583 [ # # ]: 0 : if (needs_content_length) {
584 [ # # # # : 0 : res.headers.Write("Content-Length", util::ToString(reply_body.size()));
# # ]
585 : : }
586 : :
587 [ # # # # : 0 : if (needs_body && !res.headers.FindFirst("Content-Type")) {
# # # # ]
588 : : // Default type from libevent evhttp_new_object()
589 [ # # # # : 0 : res.headers.Write("Content-Type", "text/html; charset=ISO-8859-1");
# # ]
590 : : }
591 : :
592 [ # # ]: 0 : auto connection_header{m_headers.FindFirst("Connection")};
593 [ # # # # : 0 : if (connection_header && ToLower(connection_header.value()) == "close") {
# # # # #
# ]
594 : : // Might not exist already but we need to replace it, not append to it
595 [ # # ]: 0 : res.headers.RemoveAll("Connection");
596 : :
597 [ # # # # : 0 : res.headers.Write("Connection", "close");
# # ]
598 : 0 : keep_alive = false;
599 : : }
600 : :
601 [ # # ]: 0 : if (std::shared_ptr client{m_client.lock()}) {
602 [ # # ]: 0 : client->Send(res, reply_body, keep_alive);
603 : 0 : }
604 : 0 : }
605 : :
606 : 0 : void HTTPRemoteClient::Send(const HTTPResponse& res, std::span<const std::byte> reply_body, bool keep_alive)
607 : : {
608 : 0 : m_keep_alive = keep_alive;
609 : :
610 : : // Serialize the response headers
611 : 0 : const std::string headers{res.StringifyHeaders()};
612 [ # # # # ]: 0 : const auto headers_bytes{std::as_bytes(std::span{headers})};
613 : :
614 : 0 : bool send_buffer_was_empty{false};
615 : : // Fill the send buffer with the complete serialized response headers + body
616 : 0 : {
617 [ # # ]: 0 : LOCK(m_send_mutex);
618 : 0 : send_buffer_was_empty = m_send_buffer.empty();
619 [ # # ]: 0 : m_send_buffer.insert(m_send_buffer.end(), headers_bytes.begin(), headers_bytes.end());
620 : :
621 : : // We've been using std::span up until now but it is finally time to copy
622 : : // data. The original data will go out of scope when WriteReply() returns.
623 : : // This is analogous to the memcpy() in libevent's evbuffer_add()
624 [ # # ]: 0 : m_send_buffer.insert(m_send_buffer.end(), reply_body.begin(), reply_body.end());
625 : :
626 : : // If the buffer already held data, the I/O thread is (or soon will be)
627 : : // draining it, so flag that there is more data to send. This must happen
628 : : // while holding m_send_mutex and while the buffer is known non-empty:
629 : : // setting m_send_ready after releasing the lock would race with the I/O
630 : : // thread draining the buffer to empty and clearing m_send_ready in
631 : : // between, leaving m_send_ready set on an empty buffer. The I/O loop would
632 : : // then only ever poll the socket for writeability, never read the client's
633 : : // next request, and wedge the connection.
634 [ # # ]: 0 : if (!send_buffer_was_empty) m_send_ready = true;
635 : 0 : }
636 : :
637 [ # # # # : 0 : LogDebug(
# # ]
638 : : BCLog::HTTP,
639 : : "HTTPResponse (status code: %d size: %lld) added to send buffer for client %s (id=%llu)",
640 : : res.status,
641 : : headers_bytes.size() + reply_body.size(),
642 : : m_origin,
643 : : m_id);
644 : :
645 : : // If the send buffer was empty before we wrote this reply, we can try an
646 : : // optimistic send akin to CConnman::PushMessage() in which we
647 : : // push the data directly out the socket to client right now, instead
648 : : // of waiting for the next iteration of the I/O loop.
649 [ # # ]: 0 : if (send_buffer_was_empty) {
650 [ # # ]: 0 : MaybeSendBytesFromBuffer();
651 : : }
652 : :
653 : : // Signal to the I/O loop that we are ready to handle the next request.
654 : 0 : m_req_busy = false;
655 : 0 : }
656 : :
657 : 0 : CService HTTPRequest::GetPeer() const
658 : : {
659 [ # # ]: 0 : if (std::shared_ptr c{m_client.lock()}) {
660 : 0 : return c->GetPeer();
661 : : } else {
662 [ # # ]: 0 : return {};
663 : 0 : }
664 : : }
665 : :
666 : 0 : std::optional<std::string> HTTPRequest::GetQueryParameter(const std::string_view key) const
667 : : {
668 [ # # ]: 0 : return GetQueryParameterFromUri(m_target, key);
669 : : }
670 : :
671 : : // See libevent http.c evhttp_parse_query_impl()
672 : : // and https://www.rfc-editor.org/rfc/rfc3986#section-3.4
673 : 0 : std::optional<std::string> GetQueryParameterFromUri(const std::string_view uri, const std::string_view key)
674 : : {
675 : : // find query in URI
676 : 0 : size_t start = uri.find('?');
677 [ # # ]: 0 : if (start == std::string::npos) return std::nullopt;
678 : 0 : size_t end = uri.find('#', start);
679 [ # # ]: 0 : if (end == std::string::npos) {
680 : 0 : end = uri.length();
681 : : }
682 : 0 : const std::string_view query{uri.data() + start + 1, end - start - 1};
683 : : // find requested parameter in query
684 : 0 : const std::vector<std::string_view> params{Split<std::string_view>(query, "&")};
685 [ # # ]: 0 : for (const std::string_view& param : params) {
686 : 0 : size_t delim = param.find('=');
687 [ # # # # : 0 : if (key == UrlDecode(param.substr(0, delim))) {
# # ]
688 [ # # ]: 0 : if (delim == std::string::npos) {
689 [ # # ]: 0 : return "";
690 : : } else {
691 [ # # # # ]: 0 : return std::string(UrlDecode(param.substr(delim + 1)));
692 : : }
693 : : }
694 : : }
695 : 0 : return std::nullopt;
696 : 0 : }
697 : :
698 : 470 : std::optional<std::string> HTTPRequest::GetHeader(const std::string_view hdr) const
699 : : {
700 : 470 : return m_headers.FindFirst(hdr);
701 : : }
702 : :
703 : 94 : void HTTPRequest::WriteHeader(std::string&& hdr, std::string&& value)
704 : : {
705 : 94 : m_response_headers.Write(std::move(hdr), std::move(value));
706 : 94 : }
707 : :
708 : 0 : util::Expected<void, std::string> HTTPServer::BindAndStartListening(const CService& to)
709 : : {
710 : : // Create socket for listening for incoming connections
711 : 0 : sockaddr_storage storage;
712 : 0 : auto sa = reinterpret_cast<sockaddr*>(&storage);
713 : 0 : socklen_t len{sizeof(storage)};
714 [ # # ]: 0 : if (!to.GetSockAddr(sa, &len)) {
715 [ # # ]: 0 : return util::Unexpected{strprintf("Bind address family for %s not supported", to.ToStringAddrPort())};
716 : : }
717 : :
718 : 0 : std::unique_ptr<Sock> sock{CreateSock(to.GetSAFamily(), SOCK_STREAM, IPPROTO_TCP)};
719 [ # # ]: 0 : if (!sock) {
720 [ # # ]: 0 : return util::Unexpected{strprintf("Cannot create %s listen socket: %s",
721 [ # # ]: 0 : to.ToStringAddrPort(),
722 [ # # ]: 0 : NetworkErrorString(WSAGetLastError()))};
723 : : }
724 : :
725 : : // Allow binding if the port is still in TIME_WAIT state after
726 : : // the program was closed and restarted.
727 [ # # # # ]: 0 : if (sock->SetSockOpt(SOL_SOCKET, SO_REUSEADDR, &SOCKET_OPTION_TRUE, sizeof(SOCKET_OPTION_TRUE)) == SOCKET_ERROR) {
728 [ # # # # : 0 : LogDebug(BCLog::HTTP,
# # # # #
# ]
729 : : "Cannot set SO_REUSEADDR on %s listen socket: %s, continuing anyway",
730 : : to.ToStringAddrPort(),
731 : : NetworkErrorString(WSAGetLastError()));
732 : : }
733 : :
734 : : // some systems don't have IPV6_V6ONLY but are always v6only; others do have the option
735 : : // and enable it by default or not. Try to enable it, if possible.
736 [ # # ]: 0 : if (to.IsIPv6()) {
737 : : #ifdef IPV6_V6ONLY
738 [ # # # # ]: 0 : if (sock->SetSockOpt(IPPROTO_IPV6, IPV6_V6ONLY, &SOCKET_OPTION_TRUE, sizeof(SOCKET_OPTION_TRUE)) == SOCKET_ERROR) {
739 [ # # # # : 0 : LogDebug(BCLog::HTTP,
# # # # #
# ]
740 : : "Cannot set IPV6_V6ONLY on %s listen socket: %s, continuing anyway",
741 : : to.ToStringAddrPort(),
742 : : NetworkErrorString(WSAGetLastError()));
743 : : }
744 : : #endif
745 : : #ifdef WIN32
746 : : int prot_level{PROTECTION_LEVEL_UNRESTRICTED};
747 : : if (sock->SetSockOpt(IPPROTO_IPV6,
748 : : IPV6_PROTECTION_LEVEL,
749 : : &prot_level,
750 : : sizeof(prot_level)) == SOCKET_ERROR) {
751 : : LogDebug(BCLog::HTTP,
752 : : "Cannot set IPV6_PROTECTION_LEVEL on %s listen socket: %s, continuing anyway",
753 : : to.ToStringAddrPort(),
754 : : NetworkErrorString(WSAGetLastError()));
755 : : }
756 : : #endif
757 : : }
758 : :
759 [ # # # # ]: 0 : if (sock->Bind(sa, len) == SOCKET_ERROR) {
760 : 0 : const int err{WSAGetLastError()};
761 [ # # ]: 0 : if (err == WSAEADDRINUSE) {
762 [ # # ]: 0 : return util::Unexpected{strprintf("Unable to bind to %s on this computer. %s is probably already running.",
763 [ # # ]: 0 : to.ToStringAddrPort(),
764 : 0 : CLIENT_NAME)};
765 : : } else {
766 [ # # ]: 0 : return util::Unexpected{strprintf("Unable to bind to %s on this computer (bind returned error %s)",
767 [ # # ]: 0 : to.ToStringAddrPort(),
768 [ # # ]: 0 : NetworkErrorString(err))};
769 : : }
770 : : }
771 : :
772 : : // Listen for incoming connections
773 [ # # # # ]: 0 : if (sock->Listen(SOMAXCONN) == SOCKET_ERROR) {
774 [ # # ]: 0 : return util::Unexpected{strprintf("Cannot listen on %s: %s",
775 [ # # ]: 0 : to.ToStringAddrPort(),
776 [ # # ]: 0 : NetworkErrorString(WSAGetLastError()))};
777 : : }
778 : :
779 [ # # ]: 0 : m_listen.emplace_back(std::move(sock));
780 : :
781 : 0 : return {};
782 : 0 : }
783 : :
784 : 0 : void HTTPServer::StopListening()
785 : : {
786 : 0 : m_listen.clear();
787 : 0 : }
788 : :
789 : 0 : void HTTPServer::StartSocketsThreads()
790 : : {
791 : : // The socket handler reads m_allow_subnets in ClientAllowed(). InitHTTPAllowList()
792 : : // must have populated it first; localhost entries are always added, so an empty
793 : : // list means it was never called and every connection is rejected.
794 [ # # ]: 0 : Assume(!m_allow_subnets.empty());
795 : :
796 : 0 : m_thread_socket_handler = std::thread(&util::TraceThread,
797 : : "http",
798 : 0 : [this] { ThreadSocketHandler(); });
799 : 0 : }
800 : :
801 : 0 : void HTTPServer::JoinSocketsThreads()
802 : : {
803 [ # # ]: 0 : if (m_thread_socket_handler.joinable()) {
804 : 0 : m_thread_socket_handler.join();
805 : : }
806 : 0 : }
807 : :
808 : 0 : std::unique_ptr<Sock> HTTPServer::AcceptConnection(const Sock& listen_sock, CService& addr)
809 : : {
810 : : // Make sure we only operate on our own listening sockets
811 [ # # # # ]: 0 : Assume(std::ranges::any_of(m_listen, [&](const auto& sock) { return sock.get() == &listen_sock; }));
812 : :
813 : 0 : sockaddr_storage storage;
814 : 0 : socklen_t len{sizeof(storage)};
815 : 0 : auto sa = reinterpret_cast<sockaddr*>(&storage);
816 : :
817 : 0 : auto sock{listen_sock.Accept(sa, &len)};
818 : :
819 [ # # ]: 0 : if (!sock) {
820 : 0 : const int err{WSAGetLastError()};
821 [ # # ]: 0 : if (err != WSAEWOULDBLOCK) {
822 [ # # # # : 0 : LogDebug(BCLog::HTTP,
# # # # ]
823 : : "Cannot accept new connection: %s",
824 : : NetworkErrorString(err));
825 : : }
826 : 0 : return {};
827 : : }
828 : :
829 : : // The OS handed us a valid socket but we can't determine its source address.
830 [ # # # # ]: 0 : if (!addr.SetSockAddr(sa, len)) {
831 [ # # # # : 0 : LogDebug(BCLog::HTTP,
# # ]
832 : : "Unknown socket family");
833 : : }
834 : :
835 : : // Early address-based allow check
836 [ # # # # ]: 0 : if (!ClientAllowed(addr)) {
837 [ # # # # : 0 : LogDebug(BCLog::HTTP, "Connection from %s rejected: Client network is not allowed HTTP access\n",
# # # # ]
838 : : addr.ToStringAddrPort());
839 : : // Socket destroyed, connection aborted
840 : 0 : return {};
841 : : }
842 : :
843 : 0 : return sock;
844 : 0 : }
845 : :
846 : 0 : HTTPServer::Id HTTPServer::GetNewId()
847 : : {
848 : 0 : return m_next_id.fetch_add(1, std::memory_order_relaxed);
849 : : }
850 : :
851 : 0 : void HTTPServer::NewSockAccepted(std::unique_ptr<Sock>&& sock, const CService& addr)
852 : : {
853 [ # # ]: 0 : if (!sock->IsSelectable()) {
854 [ # # # # ]: 0 : LogDebug(BCLog::HTTP,
855 : : "connection from %s dropped: non-selectable socket",
856 : : addr.ToStringAddrPort());
857 : 0 : return;
858 : : }
859 : :
860 : : // According to the internet TCP_NODELAY is not carried into accepted sockets
861 : : // on all platforms. Set it again here just to be sure.
862 [ # # ]: 0 : if (sock->SetSockOpt(IPPROTO_TCP, TCP_NODELAY, &SOCKET_OPTION_TRUE, sizeof(SOCKET_OPTION_TRUE)) == SOCKET_ERROR) {
863 [ # # # # ]: 0 : LogDebug(BCLog::HTTP, "connection from %s: unable to set TCP_NODELAY, continuing anyway",
864 : : addr.ToStringAddrPort());
865 : : }
866 : :
867 : 0 : const Id id{GetNewId()};
868 : :
869 [ # # # # ]: 0 : m_connected.push_back(std::make_shared<HTTPRemoteClient>(id, addr, std::move(sock)));
870 : : // Report back to the main thread
871 : 0 : m_connected_size.fetch_add(1, std::memory_order_relaxed);
872 : :
873 [ # # # # ]: 0 : LogDebug(BCLog::HTTP,
874 : : "HTTP Connection accepted from %s (id=%llu)",
875 : : addr.ToStringAddrPort(), id);
876 : : }
877 : :
878 : 0 : void HTTPServer::SocketHandlerConnected(const IOReadiness& io_readiness) const
879 : : {
880 [ # # ]: 0 : for (const auto& [sock, events] : io_readiness.events_per_sock) {
881 [ # # ]: 0 : if (m_interrupt_net) {
882 : : return;
883 : : }
884 : :
885 : 0 : auto it{io_readiness.httpclients_per_sock.find(sock)};
886 [ # # ]: 0 : if (it == io_readiness.httpclients_per_sock.end()) {
887 : 0 : continue;
888 : : }
889 [ # # ]: 0 : const std::shared_ptr<HTTPRemoteClient>& client{it->second};
890 : :
891 : 0 : bool send_ready = events.occurred & Sock::SendEvent;
892 : 0 : bool recv_ready = events.occurred & Sock::RecvEvent;
893 : 0 : bool err_ready = events.occurred & Sock::ErrorEvent;
894 : :
895 [ # # ]: 0 : if (send_ready) {
896 : : // Try to send as much data as is ready for this client.
897 : : // If there's an error we can skip the receive phase for this client
898 : : // because we need to disconnect.
899 [ # # ]: 0 : if (!client->MaybeSendBytesFromBuffer()) {
900 : 0 : recv_ready = false;
901 : : }
902 : : }
903 : :
904 [ # # ]: 0 : if (recv_ready || err_ready) {
905 : 0 : client->Receive();
906 : : }
907 : : // Process as much received data as we can.
908 : : // This executes for every client whether or not reading or writing
909 : : // took place because it also (might) parse a request we have already
910 : : // received and pass it to a worker thread.
911 [ # # ]: 0 : if (std::unique_ptr<HTTPRequest> request{HTTPRemoteClient::TryReadRequest(client)})
912 : : {
913 [ # # ]: 0 : LOCK(m_request_dispatcher_mutex);
914 [ # # ]: 0 : m_request_dispatcher(std::move(request));
915 : 0 : }
916 : : }
917 : : }
918 : :
919 : 0 : void HTTPRemoteClient::Receive()
920 : : {
921 : 0 : char buf[0x10000]; // typical socket buffer is 8K-64K
922 : :
923 [ # # # # ]: 0 : const ssize_t nrecv{WITH_LOCK(
924 : : m_sock_mutex,
925 : : return m_sock->Recv(buf, sizeof(buf), MSG_DONTWAIT);)};
926 : :
927 [ # # ]: 0 : if (nrecv < 0) {
928 : 0 : const int err = WSAGetLastError();
929 [ # # ]: 0 : if (IOErrorIsPermanent(err)) {
930 [ # # # # ]: 0 : LogDebug(
931 : : BCLog::HTTP,
932 : : "Permanent read error from %s (id=%llu): %s",
933 : : m_origin,
934 : : m_id,
935 : : NetworkErrorString(err));
936 : 0 : m_disconnect = true;
937 : : }
938 [ # # ]: 0 : } else if (nrecv == 0) {
939 [ # # ]: 0 : LogDebug(
940 : : BCLog::HTTP,
941 : : "Received EOF from %s (id=%llu)",
942 : : m_origin,
943 : : m_id);
944 : 0 : m_disconnect = true;
945 : : } else {
946 : : // Reset idle timeout
947 : 0 : m_idle_since = Now<SteadySeconds>();
948 : :
949 : : // Prevent disconnect until all requests are completely handled.
950 [ # # ]: 0 : m_connection_busy = true;
951 : :
952 : : // Copy data from socket buffer to client receive buffer
953 : 0 : m_recv_buffer.insert(
954 : 0 : m_recv_buffer.end(),
955 : : buf,
956 [ # # ]: 0 : buf + nrecv);
957 : : }
958 : 0 : }
959 : :
960 : 0 : void HTTPServer::SocketHandlerListening(const Sock::EventsPerSock& events_per_sock)
961 : : {
962 [ # # ]: 0 : if (m_stop_accepting) return;
963 [ # # ]: 0 : for (const auto& sock : m_listen) {
964 [ # # ]: 0 : if (m_interrupt_net) {
965 : : return;
966 : : }
967 [ # # # # ]: 0 : const auto it = events_per_sock.find(sock);
968 [ # # # # ]: 0 : if (it != events_per_sock.end() && it->second.occurred & Sock::RecvEvent) {
969 : : // Drain all pending connections from this socket up to the limit.
970 : : // Stop early if the kernel queue is empty (AcceptConnection returns null)
971 : : // or if accepting the last connection brought us to the limit.
972 [ # # ]: 0 : while (GetConnectionsCount() < static_cast<size_t>(m_rpcmaxconnections)) {
973 : 0 : CService addr_accepted;
974 [ # # ]: 0 : auto sock_accepted{AcceptConnection(*sock, addr_accepted)};
975 [ # # ]: 0 : if (!sock_accepted) break;
976 [ # # ]: 0 : NewSockAccepted(std::move(sock_accepted), addr_accepted);
977 : 0 : }
978 : : }
979 : : }
980 : : }
981 : :
982 : 0 : HTTPServer::IOReadiness HTTPServer::GenerateWaitSockets() const
983 : : {
984 [ # # ]: 0 : IOReadiness io_readiness;
985 : :
986 : : // If the server is already handling its max connected clients count,
987 : : // don't bother checking the listening sockets for new inbound connections.
988 : : // Leave them in the kernel's queue until space in the application opens
989 : : // up (or the client times out on its own).
990 [ # # ]: 0 : if (GetConnectionsCount() < static_cast<size_t>(m_rpcmaxconnections)) {
991 [ # # ]: 0 : for (const auto& sock : m_listen) {
992 [ # # ]: 0 : io_readiness.events_per_sock.emplace(sock, Sock::Events{Sock::RecvEvent});
993 : : }
994 : : }
995 : :
996 [ # # ]: 0 : for (const auto& http_client : m_connected) {
997 : : // Safely copy the shared pointer to the socket
998 [ # # ]: 0 : std::shared_ptr<Sock> sock{http_client->GetSock()};
999 : :
1000 : : // Check if client is ready to send data. Don't try to receive again
1001 : : // until the send buffer is cleared (all data sent to client).
1002 : : // Keep this as a separate critical section from the m_sock_mutex one above:
1003 : : // never hold m_sock_mutex and m_send_mutex at the same time here.
1004 : : // MaybeSendBytesFromBuffer() locks m_send_mutex then m_sock_mutex, so nesting
1005 : : // them in the opposite order here would risk a lock-order inversion deadlock.
1006 [ # # # # ]: 0 : Sock::Event event = (http_client->ReadyToSend() ? Sock::SendEvent : Sock::RecvEvent);
1007 [ # # ]: 0 : io_readiness.events_per_sock.emplace(sock, Sock::Events{event});
1008 [ # # # # ]: 0 : io_readiness.httpclients_per_sock.emplace(sock, http_client);
1009 : 0 : }
1010 : :
1011 : 0 : return io_readiness;
1012 : 0 : }
1013 : :
1014 : : /// \anchor http
1015 : 0 : void HTTPServer::ThreadSocketHandler()
1016 : : {
1017 [ # # ]: 0 : while (!m_interrupt_net) {
1018 : : // Check for the readiness of the already connected sockets and the
1019 : : // listening sockets in one call ("readiness" as in poll(2) or
1020 : : // select(2)). If none are ready, wait for a short while and return
1021 : : // empty sets.
1022 : 0 : auto io_readiness{GenerateWaitSockets()};
1023 [ # # # # ]: 0 : if (io_readiness.events_per_sock.empty() ||
1024 : : // WaitMany() may as well be a static method, the context of the first Sock in the vector is not relevant.
1025 [ # # ]: 0 : !io_readiness.events_per_sock.begin()->first->WaitMany(SELECT_TIMEOUT,
1026 : : io_readiness.events_per_sock)) {
1027 [ # # ]: 0 : m_interrupt_net.sleep_for(SELECT_TIMEOUT);
1028 : : }
1029 : :
1030 : : // Service (send/receive) each of the already connected sockets.
1031 [ # # ]: 0 : SocketHandlerConnected(io_readiness);
1032 : :
1033 : : // Accept new connections from listening sockets.
1034 [ # # ]: 0 : SocketHandlerListening(io_readiness.events_per_sock);
1035 : :
1036 : : // Disconnect any clients that have been flagged.
1037 [ # # ]: 0 : DisconnectClients();
1038 : 0 : }
1039 : 0 : }
1040 : :
1041 : 0 : std::unique_ptr<HTTPRequest> HTTPRemoteClient::TryReadRequest(const std::shared_ptr<HTTPRemoteClient>& client)
1042 : : {
1043 : : // If we are already handling a request from
1044 : : // this client, do nothing. We'll check again on the next I/O
1045 : : // loop iteration.
1046 [ # # ]: 0 : if (client->m_req_busy) return nullptr;
1047 : :
1048 [ # # ]: 0 : if (!client->m_req) {
1049 : 0 : client->m_req = std::make_unique<HTTPRequest>(client);
1050 : : }
1051 : :
1052 : 0 : try {
1053 : : // Read data from the buffer into the current request
1054 [ # # ]: 0 : client->ReadRequest(*client->m_req);
1055 [ - - - ]: 0 : } catch (const ContentTooLargeError& e) {
1056 [ - - - - : 0 : LogDebug(
- - ]
1057 : : BCLog::HTTP,
1058 : : "HTTP request body too large from client %s (id=%llu): %s",
1059 : : client->m_origin,
1060 : : client->m_id,
1061 : : e.what());
1062 : :
1063 [ - - ]: 0 : WriteNoStoreErrorReply(*client->m_req, HTTP_CONTENT_TOO_LARGE);
1064 : 0 : client->m_disconnect = true;
1065 : 0 : return nullptr;
1066 : 0 : } catch (const std::runtime_error& e) {
1067 [ - - - - : 0 : LogDebug(
- - ]
1068 : : BCLog::HTTP,
1069 : : "Error reading HTTP request from client %s (id=%llu): %s",
1070 : : client->m_origin,
1071 : : client->m_id,
1072 : : e.what());
1073 : :
1074 : : // We failed to read a complete request from the buffer
1075 [ - - ]: 0 : WriteNoStoreErrorReply(*client->m_req, HTTP_BAD_REQUEST);
1076 : 0 : client->m_disconnect = true;
1077 : 0 : return nullptr;
1078 : 0 : }
1079 : :
1080 : : // If the request is ready, hand it to a worker.
1081 [ # # ]: 0 : if (client->m_req->GetState() == HTTPRequest::State::Complete) {
1082 [ # # # # : 0 : LogDebug(
# # # # ]
1083 : : BCLog::HTTP,
1084 : : "Received a %s request for %s from %s (id=%llu)",
1085 : : RequestMethodString(client->m_req->GetRequestMethod()),
1086 : : client->m_req->GetURI(),
1087 : : client->m_origin,
1088 : : client->m_id);
1089 : :
1090 : 0 : client->m_req_busy = true;
1091 : 0 : return std::move(client->m_req);
1092 : : }
1093 : :
1094 : 0 : return nullptr;
1095 : : }
1096 : :
1097 : 0 : void HTTPServer::DisconnectClients()
1098 : : {
1099 : 0 : const auto now{Now<SteadySeconds>()};
1100 : 0 : size_t erased = std::erase_if(m_connected,
1101 : 0 : [&](auto& client) {
1102 : 0 : return client->MaybeDisconnect(now,
1103 : : m_rpcservertimeout,
1104 : 0 : /*disconnect_all=*/m_disconnect_all_clients);
1105 : : });
1106 [ # # ]: 0 : if (erased > 0) {
1107 : : // Report back to the main thread
1108 : 0 : m_connected_size.fetch_sub(erased, std::memory_order_relaxed);
1109 : : }
1110 : 0 : }
1111 : :
1112 : 0 : bool HTTPRemoteClient::MaybeDisconnect(std::chrono::time_point<SteadyClock> now, std::chrono::seconds rpcservertimeout, bool disconnect_all)
1113 : : {
1114 : : // First check for idle timeout. We reset the timer when we send and receive data,
1115 : : // but if the server is busy handling a request we should ignore the timeout until
1116 : : // the reply is sent. If we did erase the shared_ptr<HTTPRemoteClient> reference in m_connected
1117 : : // while the server is busy with a request, it might be prematurely dropped before
1118 : : // the response has been sent, or if the HTTPRequest was holding a temporary shared_ptr
1119 : : // client on a worker thread - it would keep the socket open even after "disconnecting".
1120 [ # # # # ]: 0 : const bool is_idle{rpcservertimeout.count() > 0 &&
1121 [ # # # # ]: 0 : now - m_idle_since.load() > rpcservertimeout &&
1122 [ # # ]: 0 : !m_req_busy};
1123 : :
1124 : : // Disconnect this client due to error, end of communication, or idle timeout.
1125 : : // May drop unsent data if we are closing due to error.
1126 [ # # # # ]: 0 : if (m_disconnect || is_idle) {
1127 [ # # ]: 0 : if (is_idle) {
1128 [ # # ]: 0 : LogDebug(BCLog::HTTP,
1129 : : "HTTP client idle timeout %s (id=%llu)",
1130 : : m_origin,
1131 : : m_id);
1132 : : }
1133 : : } else {
1134 : : // Disconnect this client because the server is shutting
1135 : : // down and we need to disconnect all clients...
1136 [ # # ]: 0 : if (disconnect_all) {
1137 : : // ...unless we still have data for this client.
1138 [ # # ]: 0 : if (m_connection_busy) {
1139 : : // There is still data for this healthy-connected client.
1140 : : // Continue the I/O loop until all data is sent or an error is encountered.
1141 : : return false;
1142 : : } else {
1143 : : // This is a healthy persistent connection (e.g. keep-alive)
1144 : : // but it's time to say goodbye.
1145 : : ;
1146 : : }
1147 : : } else {
1148 : : // No reason to disconnect.
1149 : : return false;
1150 : : }
1151 : : }
1152 : : // No reason NOT to disconnect, log and remove.
1153 [ # # ]: 0 : LogDebug(BCLog::HTTP,
1154 : : "Disconnecting HTTP client %s (id=%llu)",
1155 : : m_origin,
1156 : : m_id);
1157 : : return true;
1158 : : }
1159 : :
1160 : 0 : void HTTPServer::ClearConnectedClients()
1161 : : {
1162 [ # # ]: 0 : Assume(!m_thread_socket_handler.joinable()); // must be called after JoinSocketsThreads()
1163 [ # # ]: 0 : if (m_connected.empty()) return;
1164 [ # # ]: 0 : LogWarning("Force-disconnecting %d HTTP client(s) that did not disconnect gracefully", m_connected.size());
1165 [ # # ]: 0 : m_connected_size.fetch_sub(m_connected.size(), std::memory_order_relaxed);
1166 : 0 : m_connected.clear();
1167 : : }
1168 : :
1169 : 0 : void HTTPRemoteClient::ReadRequest(HTTPRequest& req)
1170 : : {
1171 [ # # ]: 0 : if (m_recv_buffer.empty()) return;
1172 : :
1173 [ # # ]: 0 : LineReader reader(m_recv_buffer, MAX_HEADERS_SIZE);
1174 : :
1175 : 0 : try {
1176 [ # # # # ]: 0 : switch (req.GetState()) {
1177 : 0 : case HTTPRequest::State::Init:
1178 [ # # # # ]: 0 : if (!req.LoadControlData(reader)) break;
1179 : 0 : req.SetState(HTTPRequest::State::NeedsHeaders);
1180 : 0 : [[fallthrough]];
1181 : :
1182 : 0 : case HTTPRequest::State::NeedsHeaders:
1183 [ # # # # ]: 0 : if (!req.LoadHeaders(reader)) break;
1184 : 0 : req.SetState(HTTPRequest::State::NeedsBody);
1185 : 0 : [[fallthrough]];
1186 : :
1187 : 0 : case HTTPRequest::State::NeedsBody:
1188 [ # # # # ]: 0 : if (!req.LoadBody(reader)) break;
1189 : 0 : req.SetState(HTTPRequest::State::Complete);
1190 : : [[fallthrough]];
1191 : :
1192 : : case HTTPRequest::State::Complete:
1193 : : break;
1194 : :
1195 : : case HTTPRequest::State::Error:
1196 : : break;
1197 : : }
1198 : 0 : } catch (...) {
1199 : : // Don't try to read any more data for this request
1200 : 0 : req.SetState(HTTPRequest::State::Error);
1201 : : // Clear the memory allocated to this client, caller must disconnect
1202 : 0 : m_recv_buffer.clear();
1203 : 0 : throw;
1204 : 0 : }
1205 : :
1206 : : // Remove the bytes read out of the buffer.
1207 : 0 : m_recv_buffer.erase(
1208 : 0 : m_recv_buffer.begin(),
1209 : 0 : m_recv_buffer.begin() + reader.Consumed());
1210 : : }
1211 : :
1212 : 0 : bool HTTPRemoteClient::MaybeSendBytesFromBuffer()
1213 : : {
1214 : : // Send as much data from this client's buffer as we can
1215 : 0 : LOCK(m_send_mutex);
1216 [ # # ]: 0 : if (!m_send_buffer.empty()) {
1217 : : // Socket flags (See kernel docs for send(2) and tcp(7) for more details).
1218 : : // MSG_NOSIGNAL: If the remote end of the connection is closed,
1219 : : // fail with EPIPE (an error) as opposed to triggering
1220 : : // SIGPIPE which terminates the process.
1221 : : // MSG_DONTWAIT: Makes the send operation non-blocking regardless of socket blocking mode.
1222 : : // MSG_MORE: We do not set this flag here because http responses are usually
1223 : : // small and we want the kernel to send them right away. Setting MSG_MORE
1224 : : // would "cork" the socket to prevent sending out partial frames.
1225 : 0 : int flags{MSG_NOSIGNAL | MSG_DONTWAIT};
1226 : :
1227 : : // Try to send bytes through socket
1228 : 0 : ssize_t bytes_sent;
1229 : 0 : {
1230 [ # # ]: 0 : LOCK(m_sock_mutex);
1231 [ # # # # : 0 : bytes_sent = m_sock->Send(m_send_buffer.data(),
# # ]
1232 : : m_send_buffer.size(),
1233 : : flags);
1234 : 0 : }
1235 : :
1236 [ # # ]: 0 : if (bytes_sent < 0) {
1237 : : // Something went wrong
1238 : 0 : const int err{WSAGetLastError()};
1239 [ # # ]: 0 : if (!IOErrorIsPermanent(err)) {
1240 : : // The error can be safely ignored, try the send again on the next I/O loop.
1241 : 0 : m_send_ready = true;
1242 : 0 : m_connection_busy = true;
1243 : 0 : return true;
1244 : : } else {
1245 : : // Unrecoverable error, log and disconnect client.
1246 [ # # # # : 0 : LogDebug(
# # # # ]
1247 : : BCLog::HTTP,
1248 : : "Error sending HTTP response data to client %s (id=%llu): %s",
1249 : : m_origin,
1250 : : m_id,
1251 : : NetworkErrorString(err));
1252 : 0 : m_send_ready = false;
1253 : 0 : m_disconnect = true;
1254 : :
1255 : : // Do not attempt to read from this client.
1256 : 0 : return false;
1257 : : }
1258 : : }
1259 : :
1260 : : // Successful send, remove sent bytes from our local buffer.
1261 [ # # # # ]: 0 : Assume(static_cast<size_t>(bytes_sent) <= m_send_buffer.size());
1262 : 0 : m_send_buffer.erase(m_send_buffer.begin(),
1263 : 0 : m_send_buffer.begin() + bytes_sent);
1264 : :
1265 [ # # # # : 0 : LogDebug(
# # ]
1266 : : BCLog::HTTP,
1267 : : "Sent %d bytes to client %s (id=%llu)",
1268 : : bytes_sent,
1269 : : m_origin,
1270 : : m_id);
1271 : :
1272 : : // This check is inside the if(!empty) block meaning "there was data but now its gone".
1273 : : // We wouldn't want to change the flags if MaybeSendBytesFromBuffer() was called
1274 : : // on an already-empty m_send_buffer because the connection might have just been opened.
1275 [ # # ]: 0 : if (m_send_buffer.empty()) {
1276 : 0 : m_send_ready = false;
1277 [ # # ]: 0 : m_connection_busy = false;
1278 : :
1279 : : // Our work is done here
1280 [ # # ]: 0 : if (!m_keep_alive) {
1281 : 0 : m_disconnect = true;
1282 : : // Do not attempt to read from this client.
1283 : 0 : return false;
1284 : : }
1285 : : } else {
1286 : : // The send buffer isn't flushed yet, try to push more on the next loop.
1287 : 0 : m_send_ready = true;
1288 : 0 : m_connection_busy = true;
1289 : : }
1290 : :
1291 : : // Finally, reset idle timeout
1292 : 0 : m_idle_since = Now<SteadySeconds>();
1293 : : }
1294 : :
1295 : : return true;
1296 : 0 : }
1297 : :
1298 : 0 : bool InitHTTPServer()
1299 : : {
1300 : : // Create HTTPServer
1301 : 0 : g_http_server = std::make_unique<HTTPServer>(MaybeDispatchRequestToWorker);
1302 : :
1303 [ # # ]: 0 : if (!g_http_server->InitHTTPAllowList()) {
1304 : : return false;
1305 : : }
1306 : :
1307 : 0 : g_http_server->SetServerTimeout(std::chrono::seconds(gArgs.GetIntArg("-rpcservertimeout", DEFAULT_HTTP_SERVER_TIMEOUT)));
1308 [ # # # # ]: 0 : g_http_server->SetMaxConnections(std::max(gArgs.GetArg<int>("-rpcmaxconnections", DEFAULT_MAX_HTTP_CONNECTIONS), 1));
1309 : :
1310 : : // Bind HTTP server to specified addresses
1311 : 0 : std::vector<std::pair<std::string, uint16_t>> endpoints{GetBindAddresses()};
1312 : 0 : bool bind_success{false};
1313 [ # # # # ]: 0 : for (const auto& [address_string, port] : endpoints) {
1314 [ # # ]: 0 : LogInfo("Binding RPC on address %s port %i", address_string, port);
1315 [ # # # # ]: 0 : const std::optional<CService> addr{Lookup(address_string, port, false)};
1316 [ # # ]: 0 : if (addr) {
1317 [ # # # # ]: 0 : if (addr->IsBindAny()) {
1318 [ # # ]: 0 : LogWarning("The RPC server is not safe to expose to untrusted networks such as the public internet");
1319 : : }
1320 [ # # # # ]: 0 : auto result{g_http_server->BindAndStartListening(addr.value())};
1321 [ # # ]: 0 : if (!result) {
1322 [ # # # # ]: 0 : LogWarning("Binding RPC on address %s failed: %s", addr->ToStringAddrPort(), result.error());
1323 : : } else {
1324 : : bind_success = true;
1325 : : }
1326 : 0 : } else {
1327 [ # # ]: 0 : LogWarning("Could not bind RPC on address %s port %i: Address lookup failed.", address_string, port);
1328 : : }
1329 : 0 : }
1330 : :
1331 [ # # ]: 0 : if (!bind_success) {
1332 [ # # ]: 0 : LogError("Unable to bind any endpoint for RPC server");
1333 : : return false;
1334 : : }
1335 : :
1336 [ # # # # : 0 : LogDebug(BCLog::HTTP, "Initialized HTTP server");
# # ]
1337 : :
1338 [ # # # # : 0 : g_max_queue_depth = std::max(gArgs.GetArg<int>("-rpcworkqueue", DEFAULT_HTTP_WORKQUEUE), 1);
# # ]
1339 [ # # # # : 0 : LogDebug(BCLog::HTTP, "set work queue of depth %d\n", g_max_queue_depth);
# # ]
1340 : :
1341 : : return true;
1342 : 0 : }
1343 : :
1344 : 0 : void StartHTTPServer()
1345 : : {
1346 [ # # # # ]: 0 : auto rpcThreads{std::max(gArgs.GetArg<int>("-rpcthreads", DEFAULT_HTTP_THREADS), 1)};
1347 : 0 : LogInfo("Starting HTTP server with %d worker threads", rpcThreads);
1348 : 0 : g_threadpool_http.Start(rpcThreads);
1349 : 0 : g_http_server->StartSocketsThreads();
1350 : 0 : }
1351 : :
1352 : 0 : void InterruptHTTPServer()
1353 : : {
1354 [ # # ]: 0 : LogDebug(BCLog::HTTP, "Interrupting HTTP server");
1355 [ # # ]: 0 : if (g_http_server) {
1356 : : // Reject all new requests
1357 [ # # ]: 0 : g_http_server->SetRequestHandler(RejectRequest);
1358 : : }
1359 : :
1360 : : // Interrupt pool after disabling requests
1361 : 0 : g_threadpool_http.Interrupt();
1362 : 0 : }
1363 : :
1364 : 0 : void StopHTTPServer()
1365 : : {
1366 [ # # ]: 0 : LogDebug(BCLog::HTTP, "Stopping HTTP server");
1367 : :
1368 [ # # ]: 0 : LogDebug(BCLog::HTTP, "Waiting for HTTP worker threads to exit\n");
1369 : 0 : g_threadpool_http.Stop();
1370 : :
1371 [ # # ]: 0 : if (g_http_server) {
1372 : : // Must precede DisconnectAllClients(): a connection accepted after
1373 : : // GetConnectionsCount() returns 0 would survive into the destructor.
1374 : 0 : g_http_server->StopAccepting();
1375 : : // Disconnect clients as their remaining responses are flushed
1376 : 0 : g_http_server->DisconnectAllClients();
1377 : : // Wait 30 seconds for all disconnections
1378 [ # # ]: 0 : LogDebug(BCLog::HTTP, "Waiting for HTTP clients to disconnect gracefully");
1379 : 0 : const auto deadline{NodeClock::now() + 30s};
1380 [ # # ]: 0 : while (g_http_server->GetConnectionsCount() != 0) {
1381 [ # # ]: 0 : if (NodeClock::now() > deadline) {
1382 : 0 : LogWarning("Timeout waiting for HTTP clients to disconnect gracefully, continuing shutdown");
1383 : 0 : break;
1384 : : }
1385 : 0 : std::this_thread::sleep_for(50ms);
1386 : : }
1387 : : // Break HTTPServer I/O loop: stop accepting connections, sending and receiving data
1388 : 0 : g_http_server->InterruptNet();
1389 : : // Wait for HTTPServer I/O thread to exit
1390 : 0 : g_http_server->JoinSocketsThreads();
1391 : : // Force-remove any clients that survived the graceful wait
1392 : 0 : g_http_server->ClearConnectedClients();
1393 : : // Close all listening sockets
1394 : 0 : g_http_server->StopListening();
1395 : : }
1396 [ # # ]: 0 : LogDebug(BCLog::HTTP, "Stopped HTTP server");
1397 : 0 : }
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