http.js 31 KB

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  1. "use strict";
  2. Object.defineProperty(exports, "__esModule", { value: true });
  3. const core_1 = require("@opencensus/core");
  4. const httpModule = require("http");
  5. const semver = require("semver");
  6. const shimmer = require("shimmer");
  7. const url = require("url");
  8. const uuid = require("uuid");
  9. const express_1 = require("./express");
  10. class HttpPlugin extends core_1.BasePlugin {
  11. constructor(moduleName) {
  12. super(moduleName);
  13. }
  14. applyPatch() {
  15. this.logger.debug('applying patch to %s@%s', this.moduleName, this.version);
  16. shimmer.wrap(this.moduleExports, 'request', this.getPatchOutgoingRequestFunction());
  17. if (semver.satisfies(this.version, '>=8.0.0')) {
  18. shimmer.wrap(this.moduleExports, 'get', () => {
  19. return function getTrace(options, callback) {
  20. const req = httpModule.request(options, callback);
  21. req.end();
  22. return req;
  23. };
  24. });
  25. }
  26. if (this.moduleExports && this.moduleExports.Server &&
  27. this.moduleExports.Server.prototype) {
  28. shimmer.wrap(this.moduleExports.Server.prototype, 'emit', this.getPatchIncomingRequestFunction());
  29. }
  30. else {
  31. this.logger.error('Could not apply patch to %s.emit. Interface is not as expected.', this.moduleName);
  32. }
  33. return this.moduleExports;
  34. }
  35. applyUnpatch() {
  36. shimmer.unwrap(this.moduleExports, 'request');
  37. if (semver.satisfies(this.version, '>=8.0.0')) {
  38. shimmer.unwrap(this.moduleExports, 'get');
  39. }
  40. if (this.moduleExports && this.moduleExports.Server &&
  41. this.moduleExports.Server.prototype) {
  42. shimmer.unwrap(this.moduleExports.Server.prototype, 'emit');
  43. }
  44. }
  45. isIgnored(url, request, list) {
  46. if (!list) {
  47. return false;
  48. }
  49. for (const pattern of list) {
  50. if (this.isSatisfyPattern(url, request, pattern)) {
  51. return true;
  52. }
  53. }
  54. return false;
  55. }
  56. isSatisfyPattern(url, request, pattern) {
  57. if (typeof pattern === 'string') {
  58. return pattern === url;
  59. }
  60. else if (pattern instanceof RegExp) {
  61. return pattern.test(url);
  62. }
  63. else if (typeof pattern === 'function') {
  64. return pattern(url, request);
  65. }
  66. else {
  67. throw new TypeError('Pattern is in unsupported datatype');
  68. }
  69. }
  70. getPatchIncomingRequestFunction() {
  71. return (original) => {
  72. const plugin = this;
  73. return function incomingRequest(event, ...args) {
  74. if (event !== 'request') {
  75. return original.apply(this, arguments);
  76. }
  77. const request = args[0];
  78. const response = args[1];
  79. const path = url.parse(request.url).pathname;
  80. plugin.logger.debug('%s plugin incomingRequest', plugin.moduleName);
  81. if (plugin.isIgnored(path, request, plugin.options.ignoreIncomingPaths)) {
  82. return original.apply(this, arguments);
  83. }
  84. const propagation = plugin.tracer.propagation;
  85. const headers = request.headers;
  86. const getter = {
  87. getHeader(name) {
  88. return headers[name];
  89. }
  90. };
  91. const context = propagation ? propagation.extract(getter) : null;
  92. const traceOptions = {
  93. name: path,
  94. kind: core_1.SpanKind.SERVER,
  95. spanContext: context !== null ? context : undefined
  96. };
  97. return plugin.createSpan(traceOptions, rootSpan => {
  98. if (!rootSpan)
  99. return original.apply(this, arguments);
  100. plugin.tracer.wrapEmitter(request);
  101. plugin.tracer.wrapEmitter(response);
  102. const originalEnd = response.end;
  103. response.end = function () {
  104. response.end = originalEnd;
  105. const returned = response.end.apply(this, arguments);
  106. const requestUrl = url.parse(request.url || 'localhost');
  107. const host = headers.host || 'localhost';
  108. const userAgent = (headers['user-agent'] || headers['User-Agent']);
  109. rootSpan.addAttribute(HttpPlugin.ATTRIBUTE_HTTP_HOST, host.replace(/^(.*)(\:[0-9]{1,5})/, '$1'));
  110. rootSpan.addAttribute(HttpPlugin.ATTRIBUTE_HTTP_METHOD, request.method || 'GET');
  111. rootSpan.addAttribute(HttpPlugin.ATTRIBUTE_HTTP_PATH, `${requestUrl.pathname}`);
  112. let route = `${requestUrl.path}`;
  113. const middlewareStack = request[express_1.kMiddlewareStack];
  114. if (middlewareStack) {
  115. route = middlewareStack
  116. .filter(path => path !== '/')
  117. .map(path => {
  118. return path[0] === '/' ? path : '/' + path;
  119. }).join('');
  120. }
  121. rootSpan.addAttribute(HttpPlugin.ATTRIBUTE_HTTP_ROUTE, route);
  122. rootSpan.addAttribute(HttpPlugin.ATTRIBUTE_HTTP_USER_AGENT, userAgent);
  123. rootSpan.addAttribute(HttpPlugin.ATTRIBUTE_HTTP_STATUS_CODE, response.statusCode.toString());
  124. rootSpan.setStatus(HttpPlugin.convertTraceStatus(response.statusCode));
  125. rootSpan.addMessageEvent(core_1.MessageEventType.RECEIVED, uuid.v4().split('-').join(''));
  126. rootSpan.end();
  127. return returned;
  128. };
  129. return original.apply(this, arguments);
  130. });
  131. };
  132. };
  133. }
  134. getPatchOutgoingRequestFunction() {
  135. return (original) => {
  136. const plugin = this;
  137. const kind = plugin.moduleName === 'https' ? 'HTTPS' : 'HTTP';
  138. return function outgoingRequest(options, callback) {
  139. if (!options) {
  140. return original.apply(this, arguments);
  141. }
  142. let pathname = '';
  143. let method = 'GET';
  144. let origin = '';
  145. if (typeof (options) === 'string') {
  146. const parsedUrl = url.parse(options);
  147. options = parsedUrl;
  148. pathname = parsedUrl.pathname || '/';
  149. origin = `${parsedUrl.protocol || 'http:'}//${parsedUrl.host}`;
  150. }
  151. else {
  152. if (options.headers &&
  153. options.headers['x-opencensus-outgoing-request']) {
  154. plugin.logger.debug('header with "x-opencensus-outgoing-request" - do not trace');
  155. return original.apply(this, arguments);
  156. }
  157. try {
  158. pathname = options.pathname || '';
  159. if (pathname.length === 0 && typeof options.path === 'string') {
  160. pathname = url.parse(options.path).pathname || '';
  161. }
  162. method = options.method || 'GET';
  163. origin = `${options.protocol || 'http:'}//${options.host}`;
  164. }
  165. catch (e) {
  166. return original.apply(this, arguments);
  167. }
  168. }
  169. const request = original.apply(this, arguments);
  170. if (plugin.isIgnored(origin + pathname, request, plugin.options.ignoreOutgoingUrls)) {
  171. return request;
  172. }
  173. plugin.tracer.wrapEmitter(request);
  174. plugin.logger.debug('%s plugin outgoingRequest', plugin.moduleName);
  175. const traceOptions = {
  176. name: `${kind.toLowerCase()}-${(method || 'GET').toLowerCase()}`,
  177. kind: core_1.SpanKind.CLIENT
  178. };
  179. if (!plugin.tracer.currentRootSpan) {
  180. plugin.logger.debug('outgoingRequest starting a root span');
  181. return plugin.tracer.startRootSpan(traceOptions, plugin.getMakeRequestTraceFunction(request, options, plugin));
  182. }
  183. else {
  184. plugin.logger.debug('outgoingRequest starting a child span');
  185. const span = plugin.tracer.startChildSpan(traceOptions.name, traceOptions.kind);
  186. return (plugin.getMakeRequestTraceFunction(request, options, plugin))(span);
  187. }
  188. };
  189. };
  190. }
  191. getMakeRequestTraceFunction(request, options, plugin) {
  192. return (span) => {
  193. plugin.logger.debug('makeRequestTrace');
  194. if (!span) {
  195. plugin.logger.debug('makeRequestTrace span is null');
  196. return request;
  197. }
  198. const setter = {
  199. setHeader(name, value) {
  200. if (plugin.hasExpectHeader(options) && options.headers) {
  201. if (options.__cloned !== true) {
  202. options = Object.assign({}, options);
  203. options.headers = Object.assign({}, options.headers);
  204. options.__cloned = true;
  205. }
  206. options.headers[name] = value;
  207. }
  208. else {
  209. request.setHeader(name, value);
  210. }
  211. }
  212. };
  213. const propagation = plugin.tracer.propagation;
  214. if (propagation) {
  215. propagation.inject(setter, span.spanContext);
  216. }
  217. request.on('response', (response) => {
  218. plugin.tracer.wrapEmitter(response);
  219. plugin.logger.debug('outgoingRequest on response()');
  220. response.on('end', () => {
  221. plugin.logger.debug('outgoingRequest on end()');
  222. const method = response.method ? response.method : 'GET';
  223. const headers = options.headers;
  224. const userAgent = headers ? (headers['user-agent'] || headers['User-Agent']) : null;
  225. if (options.host || options.hostname) {
  226. const value = options.host || options.hostname;
  227. span.addAttribute(HttpPlugin.ATTRIBUTE_HTTP_HOST, `${value}`);
  228. }
  229. span.addAttribute(HttpPlugin.ATTRIBUTE_HTTP_METHOD, method);
  230. span.addAttribute(HttpPlugin.ATTRIBUTE_HTTP_PATH, `${options.path}`);
  231. span.addAttribute(HttpPlugin.ATTRIBUTE_HTTP_ROUTE, `${options.path}`);
  232. if (userAgent) {
  233. span.addAttribute(HttpPlugin.ATTRIBUTE_HTTP_USER_AGENT, userAgent.toString());
  234. }
  235. span.addAttribute(HttpPlugin.ATTRIBUTE_HTTP_STATUS_CODE, `${response.statusCode}`);
  236. span.setStatus(HttpPlugin.convertTraceStatus(response.statusCode || 0));
  237. span.addMessageEvent(core_1.MessageEventType.SENT, uuid.v4().split('-').join(''));
  238. span.end();
  239. });
  240. response.on('error', error => {
  241. span.addAttribute(HttpPlugin.ATTRIBUTE_HTTP_ERROR_NAME, error.name);
  242. span.addAttribute(HttpPlugin.ATTRIBUTE_HTTP_ERROR_MESSAGE, error.message);
  243. span.setStatus(core_1.CanonicalCode.UNKNOWN);
  244. span.end();
  245. });
  246. });
  247. request.on('error', error => {
  248. span.addAttribute(HttpPlugin.ATTRIBUTE_HTTP_ERROR_NAME, error.name);
  249. span.addAttribute(HttpPlugin.ATTRIBUTE_HTTP_ERROR_MESSAGE, error.message);
  250. span.setStatus(core_1.CanonicalCode.UNKNOWN);
  251. span.end();
  252. });
  253. plugin.logger.debug('makeRequestTrace return request');
  254. return request;
  255. };
  256. }
  257. createSpan(options, fn) {
  258. const forceChildspan = this.options.createSpanWithNet === true;
  259. if (forceChildspan) {
  260. const span = this.tracer.startChildSpan(options.name, options.kind);
  261. return fn(span);
  262. }
  263. else {
  264. return this.tracer.startRootSpan(options, fn);
  265. }
  266. }
  267. static convertTraceStatus(statusCode) {
  268. if (statusCode < 200 || statusCode > 504) {
  269. return TraceStatusCodes.UNKNOWN;
  270. }
  271. else if (statusCode >= 200 && statusCode < 400) {
  272. return TraceStatusCodes.OK;
  273. }
  274. else {
  275. switch (statusCode) {
  276. case (400):
  277. return TraceStatusCodes.INVALID_ARGUMENT;
  278. case (504):
  279. return TraceStatusCodes.DEADLINE_EXCEEDED;
  280. case (404):
  281. return TraceStatusCodes.NOT_FOUND;
  282. case (403):
  283. return TraceStatusCodes.PERMISSION_DENIED;
  284. case (401):
  285. return TraceStatusCodes.UNAUTHENTICATED;
  286. case (429):
  287. return TraceStatusCodes.RESOURCE_EXHAUSTED;
  288. case (501):
  289. return TraceStatusCodes.UNIMPLEMENTED;
  290. case (503):
  291. return TraceStatusCodes.UNAVAILABLE;
  292. default:
  293. return TraceStatusCodes.UNKNOWN;
  294. }
  295. }
  296. }
  297. hasExpectHeader(options) {
  298. return !!(options.headers &&
  299. options.headers.Expect);
  300. }
  301. }
  302. HttpPlugin.ATTRIBUTE_HTTP_HOST = 'http.host';
  303. HttpPlugin.ATTRIBUTE_HTTP_METHOD = 'http.method';
  304. HttpPlugin.ATTRIBUTE_HTTP_PATH = 'http.path';
  305. HttpPlugin.ATTRIBUTE_HTTP_ROUTE = 'http.route';
  306. HttpPlugin.ATTRIBUTE_HTTP_USER_AGENT = 'http.user_agent';
  307. HttpPlugin.ATTRIBUTE_HTTP_STATUS_CODE = 'http.status_code';
  308. HttpPlugin.ATTRIBUTE_HTTP_ERROR_NAME = 'http.error_name';
  309. HttpPlugin.ATTRIBUTE_HTTP_ERROR_MESSAGE = 'http.error_message';
  310. exports.HttpPlugin = HttpPlugin;
  311. var TraceStatusCodes;
  312. (function (TraceStatusCodes) {
  313. TraceStatusCodes[TraceStatusCodes["UNKNOWN"] = 2] = "UNKNOWN";
  314. TraceStatusCodes[TraceStatusCodes["OK"] = 0] = "OK";
  315. TraceStatusCodes[TraceStatusCodes["INVALID_ARGUMENT"] = 3] = "INVALID_ARGUMENT";
  316. TraceStatusCodes[TraceStatusCodes["DEADLINE_EXCEEDED"] = 4] = "DEADLINE_EXCEEDED";
  317. TraceStatusCodes[TraceStatusCodes["NOT_FOUND"] = 5] = "NOT_FOUND";
  318. TraceStatusCodes[TraceStatusCodes["PERMISSION_DENIED"] = 7] = "PERMISSION_DENIED";
  319. TraceStatusCodes[TraceStatusCodes["UNAUTHENTICATED"] = 16] = "UNAUTHENTICATED";
  320. TraceStatusCodes[TraceStatusCodes["RESOURCE_EXHAUSTED"] = 8] = "RESOURCE_EXHAUSTED";
  321. TraceStatusCodes[TraceStatusCodes["UNIMPLEMENTED"] = 12] = "UNIMPLEMENTED";
  322. TraceStatusCodes[TraceStatusCodes["UNAVAILABLE"] = 14] = "UNAVAILABLE";
  323. })(TraceStatusCodes = exports.TraceStatusCodes || (exports.TraceStatusCodes = {}));
  324. exports.plugin = new HttpPlugin('http');
  325. //# 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