update
This commit is contained in:
Dawid Dziurla
parent
d9becc67b6
commit
9308795b8b
964 changed files with 104265 additions and 16 deletions
322
node_modules/follow-redirects/index.js
generated
vendored
Normal file
322
node_modules/follow-redirects/index.js
generated
vendored
Normal file
|
|
@ -0,0 +1,322 @@
|
|||
var url = require("url");
|
||||
var http = require("http");
|
||||
var https = require("https");
|
||||
var assert = require("assert");
|
||||
var Writable = require("stream").Writable;
|
||||
var debug = require("debug")("follow-redirects");
|
||||
|
||||
// RFC7231§4.2.1: Of the request methods defined by this specification,
|
||||
// the GET, HEAD, OPTIONS, and TRACE methods are defined to be safe.
|
||||
var SAFE_METHODS = { GET: true, HEAD: true, OPTIONS: true, TRACE: true };
|
||||
|
||||
// Create handlers that pass events from native requests
|
||||
var eventHandlers = Object.create(null);
|
||||
["abort", "aborted", "error", "socket", "timeout"].forEach(function (event) {
|
||||
eventHandlers[event] = function (arg) {
|
||||
this._redirectable.emit(event, arg);
|
||||
};
|
||||
});
|
||||
|
||||
// An HTTP(S) request that can be redirected
|
||||
function RedirectableRequest(options, responseCallback) {
|
||||
// Initialize the request
|
||||
Writable.call(this);
|
||||
options.headers = options.headers || {};
|
||||
this._options = options;
|
||||
this._redirectCount = 0;
|
||||
this._redirects = [];
|
||||
this._requestBodyLength = 0;
|
||||
this._requestBodyBuffers = [];
|
||||
|
||||
// Since http.request treats host as an alias of hostname,
|
||||
// but the url module interprets host as hostname plus port,
|
||||
// eliminate the host property to avoid confusion.
|
||||
if (options.host) {
|
||||
// Use hostname if set, because it has precedence
|
||||
if (!options.hostname) {
|
||||
options.hostname = options.host;
|
||||
}
|
||||
delete options.host;
|
||||
}
|
||||
|
||||
// Attach a callback if passed
|
||||
if (responseCallback) {
|
||||
this.on("response", responseCallback);
|
||||
}
|
||||
|
||||
// React to responses of native requests
|
||||
var self = this;
|
||||
this._onNativeResponse = function (response) {
|
||||
self._processResponse(response);
|
||||
};
|
||||
|
||||
// Complete the URL object when necessary
|
||||
if (!options.pathname && options.path) {
|
||||
var searchPos = options.path.indexOf("?");
|
||||
if (searchPos < 0) {
|
||||
options.pathname = options.path;
|
||||
}
|
||||
else {
|
||||
options.pathname = options.path.substring(0, searchPos);
|
||||
options.search = options.path.substring(searchPos);
|
||||
}
|
||||
}
|
||||
|
||||
// Perform the first request
|
||||
this._performRequest();
|
||||
}
|
||||
RedirectableRequest.prototype = Object.create(Writable.prototype);
|
||||
|
||||
// Writes buffered data to the current native request
|
||||
RedirectableRequest.prototype.write = function (data, encoding, callback) {
|
||||
// Validate input and shift parameters if necessary
|
||||
if (!(typeof data === "string" || typeof data === "object" && ("length" in data))) {
|
||||
throw new Error("data should be a string, Buffer or Uint8Array");
|
||||
}
|
||||
if (typeof encoding === "function") {
|
||||
callback = encoding;
|
||||
encoding = null;
|
||||
}
|
||||
|
||||
// Ignore empty buffers, since writing them doesn't invoke the callback
|
||||
// https://github.com/nodejs/node/issues/22066
|
||||
if (data.length === 0) {
|
||||
if (callback) {
|
||||
callback();
|
||||
}
|
||||
return;
|
||||
}
|
||||
// Only write when we don't exceed the maximum body length
|
||||
if (this._requestBodyLength + data.length <= this._options.maxBodyLength) {
|
||||
this._requestBodyLength += data.length;
|
||||
this._requestBodyBuffers.push({ data: data, encoding: encoding });
|
||||
this._currentRequest.write(data, encoding, callback);
|
||||
}
|
||||
// Error when we exceed the maximum body length
|
||||
else {
|
||||
this.emit("error", new Error("Request body larger than maxBodyLength limit"));
|
||||
this.abort();
|
||||
}
|
||||
};
|
||||
|
||||
// Ends the current native request
|
||||
RedirectableRequest.prototype.end = function (data, encoding, callback) {
|
||||
// Shift parameters if necessary
|
||||
if (typeof data === "function") {
|
||||
callback = data;
|
||||
data = encoding = null;
|
||||
}
|
||||
else if (typeof encoding === "function") {
|
||||
callback = encoding;
|
||||
encoding = null;
|
||||
}
|
||||
|
||||
// Write data and end
|
||||
var currentRequest = this._currentRequest;
|
||||
this.write(data || "", encoding, function () {
|
||||
currentRequest.end(null, null, callback);
|
||||
});
|
||||
};
|
||||
|
||||
// Sets a header value on the current native request
|
||||
RedirectableRequest.prototype.setHeader = function (name, value) {
|
||||
this._options.headers[name] = value;
|
||||
this._currentRequest.setHeader(name, value);
|
||||
};
|
||||
|
||||
// Clears a header value on the current native request
|
||||
RedirectableRequest.prototype.removeHeader = function (name) {
|
||||
delete this._options.headers[name];
|
||||
this._currentRequest.removeHeader(name);
|
||||
};
|
||||
|
||||
// Proxy all other public ClientRequest methods
|
||||
[
|
||||
"abort", "flushHeaders", "getHeader",
|
||||
"setNoDelay", "setSocketKeepAlive", "setTimeout",
|
||||
].forEach(function (method) {
|
||||
RedirectableRequest.prototype[method] = function (a, b) {
|
||||
return this._currentRequest[method](a, b);
|
||||
};
|
||||
});
|
||||
|
||||
// Proxy all public ClientRequest properties
|
||||
["aborted", "connection", "socket"].forEach(function (property) {
|
||||
Object.defineProperty(RedirectableRequest.prototype, property, {
|
||||
get: function () { return this._currentRequest[property]; },
|
||||
});
|
||||
});
|
||||
|
||||
// Executes the next native request (initial or redirect)
|
||||
RedirectableRequest.prototype._performRequest = function () {
|
||||
// Load the native protocol
|
||||
var protocol = this._options.protocol;
|
||||
var nativeProtocol = this._options.nativeProtocols[protocol];
|
||||
if (!nativeProtocol) {
|
||||
this.emit("error", new Error("Unsupported protocol " + protocol));
|
||||
return;
|
||||
}
|
||||
|
||||
// If specified, use the agent corresponding to the protocol
|
||||
// (HTTP and HTTPS use different types of agents)
|
||||
if (this._options.agents) {
|
||||
var scheme = protocol.substr(0, protocol.length - 1);
|
||||
this._options.agent = this._options.agents[scheme];
|
||||
}
|
||||
|
||||
// Create the native request
|
||||
var request = this._currentRequest =
|
||||
nativeProtocol.request(this._options, this._onNativeResponse);
|
||||
this._currentUrl = url.format(this._options);
|
||||
|
||||
// Set up event handlers
|
||||
request._redirectable = this;
|
||||
for (var event in eventHandlers) {
|
||||
/* istanbul ignore else */
|
||||
if (event) {
|
||||
request.on(event, eventHandlers[event]);
|
||||
}
|
||||
}
|
||||
|
||||
// End a redirected request
|
||||
// (The first request must be ended explicitly with RedirectableRequest#end)
|
||||
if (this._isRedirect) {
|
||||
// Write the request entity and end.
|
||||
var i = 0;
|
||||
var buffers = this._requestBodyBuffers;
|
||||
(function writeNext() {
|
||||
if (i < buffers.length) {
|
||||
var buffer = buffers[i++];
|
||||
request.write(buffer.data, buffer.encoding, writeNext);
|
||||
}
|
||||
else {
|
||||
request.end();
|
||||
}
|
||||
}());
|
||||
}
|
||||
};
|
||||
|
||||
// Processes a response from the current native request
|
||||
RedirectableRequest.prototype._processResponse = function (response) {
|
||||
// Store the redirected response
|
||||
if (this._options.trackRedirects) {
|
||||
this._redirects.push({
|
||||
url: this._currentUrl,
|
||||
headers: response.headers,
|
||||
statusCode: response.statusCode,
|
||||
});
|
||||
}
|
||||
|
||||
// RFC7231§6.4: The 3xx (Redirection) class of status code indicates
|
||||
// that further action needs to be taken by the user agent in order to
|
||||
// fulfill the request. If a Location header field is provided,
|
||||
// the user agent MAY automatically redirect its request to the URI
|
||||
// referenced by the Location field value,
|
||||
// even if the specific status code is not understood.
|
||||
var location = response.headers.location;
|
||||
if (location && this._options.followRedirects !== false &&
|
||||
response.statusCode >= 300 && response.statusCode < 400) {
|
||||
// RFC7231§6.4: A client SHOULD detect and intervene
|
||||
// in cyclical redirections (i.e., "infinite" redirection loops).
|
||||
if (++this._redirectCount > this._options.maxRedirects) {
|
||||
this.emit("error", new Error("Max redirects exceeded."));
|
||||
return;
|
||||
}
|
||||
|
||||
// RFC7231§6.4: Automatic redirection needs to done with
|
||||
// care for methods not known to be safe […],
|
||||
// since the user might not wish to redirect an unsafe request.
|
||||
// RFC7231§6.4.7: The 307 (Temporary Redirect) status code indicates
|
||||
// that the target resource resides temporarily under a different URI
|
||||
// and the user agent MUST NOT change the request method
|
||||
// if it performs an automatic redirection to that URI.
|
||||
var header;
|
||||
var headers = this._options.headers;
|
||||
if (response.statusCode !== 307 && !(this._options.method in SAFE_METHODS)) {
|
||||
this._options.method = "GET";
|
||||
// Drop a possible entity and headers related to it
|
||||
this._requestBodyBuffers = [];
|
||||
for (header in headers) {
|
||||
if (/^content-/i.test(header)) {
|
||||
delete headers[header];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Drop the Host header, as the redirect might lead to a different host
|
||||
if (!this._isRedirect) {
|
||||
for (header in headers) {
|
||||
if (/^host$/i.test(header)) {
|
||||
delete headers[header];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Perform the redirected request
|
||||
var redirectUrl = url.resolve(this._currentUrl, location);
|
||||
debug("redirecting to", redirectUrl);
|
||||
Object.assign(this._options, url.parse(redirectUrl));
|
||||
this._isRedirect = true;
|
||||
this._performRequest();
|
||||
|
||||
// Discard the remainder of the response to avoid waiting for data
|
||||
response.destroy();
|
||||
}
|
||||
else {
|
||||
// The response is not a redirect; return it as-is
|
||||
response.responseUrl = this._currentUrl;
|
||||
response.redirects = this._redirects;
|
||||
this.emit("response", response);
|
||||
|
||||
// Clean up
|
||||
this._requestBodyBuffers = [];
|
||||
}
|
||||
};
|
||||
|
||||
// Wraps the key/value object of protocols with redirect functionality
|
||||
function wrap(protocols) {
|
||||
// Default settings
|
||||
var exports = {
|
||||
maxRedirects: 21,
|
||||
maxBodyLength: 10 * 1024 * 1024,
|
||||
};
|
||||
|
||||
// Wrap each protocol
|
||||
var nativeProtocols = {};
|
||||
Object.keys(protocols).forEach(function (scheme) {
|
||||
var protocol = scheme + ":";
|
||||
var nativeProtocol = nativeProtocols[protocol] = protocols[scheme];
|
||||
var wrappedProtocol = exports[scheme] = Object.create(nativeProtocol);
|
||||
|
||||
// Executes a request, following redirects
|
||||
wrappedProtocol.request = function (options, callback) {
|
||||
if (typeof options === "string") {
|
||||
options = url.parse(options);
|
||||
options.maxRedirects = exports.maxRedirects;
|
||||
}
|
||||
else {
|
||||
options = Object.assign({
|
||||
protocol: protocol,
|
||||
maxRedirects: exports.maxRedirects,
|
||||
maxBodyLength: exports.maxBodyLength,
|
||||
}, options);
|
||||
}
|
||||
options.nativeProtocols = nativeProtocols;
|
||||
assert.equal(options.protocol, protocol, "protocol mismatch");
|
||||
debug("options", options);
|
||||
return new RedirectableRequest(options, callback);
|
||||
};
|
||||
|
||||
// Executes a GET request, following redirects
|
||||
wrappedProtocol.get = function (options, callback) {
|
||||
var request = wrappedProtocol.request(options, callback);
|
||||
request.end();
|
||||
return request;
|
||||
};
|
||||
});
|
||||
return exports;
|
||||
}
|
||||
|
||||
// Exports
|
||||
module.exports = wrap({ http: http, https: https });
|
||||
module.exports.wrap = wrap;
|
||||
Loading…
Add table
Add a link
Reference in a new issue