summaryrefslogtreecommitdiffstats
path: root/devtools/client/shared/curl.js
blob: d9abf506aa164f64583a4c5b190f464250f2eead (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*
 * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
 * Copyright (C) 2008, 2009 Anthony Ricaud <rik@webkit.org>
 * Copyright (C) 2011 Google Inc. All rights reserved.
 * Copyright (C) 2009 Mozilla Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

"use strict";

const Services = require("Services");

const DEFAULT_HTTP_VERSION = "HTTP/1.1";

const Curl = {
  /**
   * Generates a cURL command string which can be used from the command line etc.
   *
   * @param object data
   *        Datasource to create the command from.
   *        The object must contain the following properties:
   *        - url:string, the URL of the request.
   *        - method:string, the request method upper cased. HEAD / GET / POST etc.
   *        - headers:array, an array of request headers {name:x, value:x} tuples.
   *        - httpVersion:string, http protocol version rfc2616 formatted. Eg. "HTTP/1.1"
   *        - postDataText:string, optional - the request payload.
   *
   * @return string
   *         A cURL command.
   */
  generateCommand: function (data) {
    const utils = CurlUtils;

    let command = ["curl"];

    // Make sure to use the following helpers to sanitize arguments before execution.
    const addParam = value => {
      const safe = /^[a-zA-Z-]+$/.test(value) ? value : escapeString(value);
      command.push(safe);
    };

    const addPostData = value => {
      const safe = /^[a-zA-Z-]+$/.test(value) ? value : escapeString(value);
      postData.push(safe);
    };

    let ignoredHeaders = new Set();

    // The cURL command is expected to run on the same platform that Firefox runs
    // (it may be different from the inspected page platform).
    let escapeString = Services.appinfo.OS == "WINNT" ?
                       utils.escapeStringWin : utils.escapeStringPosix;

    // Add URL.
    addParam(data.url);

    let postDataText = null;
    let multipartRequest = utils.isMultipartRequest(data);

    // Create post data.
    let postData = [];
    if (utils.isUrlEncodedRequest(data) ||
          ["PUT", "POST", "PATCH"].includes(data.method)) {
      postDataText = data.postDataText;
      addPostData("--data");
      addPostData(utils.writePostDataTextParams(postDataText));
      ignoredHeaders.add("content-length");
    } else if (multipartRequest) {
      postDataText = data.postDataText;
      addPostData("--data-binary");
      let boundary = utils.getMultipartBoundary(data);
      let text = utils.removeBinaryDataFromMultipartText(postDataText, boundary);
      addPostData(text);
      ignoredHeaders.add("content-length");
    }

    // Add method.
    // For GET and POST requests this is not necessary as GET is the
    // default. If --data or --binary is added POST is the default.
    if (!(data.method == "GET" || data.method == "POST")) {
      addParam("-X");
      addParam(data.method);
    }

    // Add -I (HEAD)
    // For servers that supports HEAD.
    // This will fetch the header of a document only.
    if (data.method == "HEAD") {
      addParam("-I");
    }

    // Add http version.
    if (data.httpVersion && data.httpVersion != DEFAULT_HTTP_VERSION) {
      let version = data.httpVersion.split("/")[1];
      // curl accepts --http1.0, --http1.1 and --http2 for HTTP/1.0, HTTP/1.1
      // and HTTP/2 protocols respectively. But the corresponding values in 
      // data.httpVersion are HTTP/1.0, HTTP/1.1 and HTTP/2.0
      // So in case of HTTP/2.0 (which should ideally be HTTP/2) we are using
      // only major version, and full version in other cases
      addParam("--http" + (version == "2.0" ? version.split(".")[0] : version));
    }

    // Add request headers.
    let headers = data.headers;
    if (multipartRequest) {
      let multipartHeaders = utils.getHeadersFromMultipartText(postDataText);
      headers = headers.concat(multipartHeaders);
    }
    for (let i = 0; i < headers.length; i++) {
      let header = headers[i];
      if (header.name.toLowerCase() === "accept-encoding") {
        addParam("--compressed");
        continue;
      }
      if (ignoredHeaders.has(header.name.toLowerCase())) {
        continue;
      }
      addParam("-H");
      addParam(header.name + ": " + header.value);
    }

    // Add post data.
    command = command.concat(postData);

    return command.join(" ");
  }
};

exports.Curl = Curl;

/**
 * Utility functions for the Curl command generator.
 */
const CurlUtils = {
  /**
   * Check if the request is an URL encoded request.
   *
   * @param object data
   *        The data source. See the description in the Curl object.
   * @return boolean
   *         True if the request is URL encoded, false otherwise.
   */
  isUrlEncodedRequest: function (data) {
    let postDataText = data.postDataText;
    if (!postDataText) {
      return false;
    }

    postDataText = postDataText.toLowerCase();
    if (postDataText.includes("content-type: application/x-www-form-urlencoded")) {
      return true;
    }

    let contentType = this.findHeader(data.headers, "content-type");

    return (contentType &&
      contentType.toLowerCase().includes("application/x-www-form-urlencoded"));
  },

  /**
   * Check if the request is a multipart request.
   *
   * @param object data
   *        The data source.
   * @return boolean
   *         True if the request is multipart reqeust, false otherwise.
   */
  isMultipartRequest: function (data) {
    let postDataText = data.postDataText;
    if (!postDataText) {
      return false;
    }

    postDataText = postDataText.toLowerCase();
    if (postDataText.includes("content-type: multipart/form-data")) {
      return true;
    }

    let contentType = this.findHeader(data.headers, "content-type");

    return (contentType &&
      contentType.toLowerCase().includes("multipart/form-data;"));
  },

  /**
   * Write out paramters from post data text.
   *
   * @param object postDataText
   *        Post data text.
   * @return string
   *         Post data parameters.
   */
  writePostDataTextParams: function (postDataText) {
    if (!postDataText) {
      return "";
    }
    let lines = postDataText.split("\r\n");
    return lines[lines.length - 1];
  },

  /**
   * Finds the header with the given name in the headers array.
   *
   * @param array headers
   *        Array of headers info {name:x, value:x}.
   * @param string name
   *        The header name to find.
   * @return string
   *         The found header value or null if not found.
   */
  findHeader: function (headers, name) {
    if (!headers) {
      return null;
    }

    name = name.toLowerCase();
    for (let header of headers) {
      if (name == header.name.toLowerCase()) {
        return header.value;
      }
    }

    return null;
  },

  /**
   * Returns the boundary string for a multipart request.
   *
   * @param string data
   *        The data source. See the description in the Curl object.
   * @return string
   *         The boundary string for the request.
   */
  getMultipartBoundary: function (data) {
    let boundaryRe = /\bboundary=(-{3,}\w+)/i;

    // Get the boundary string from the Content-Type request header.
    let contentType = this.findHeader(data.headers, "Content-Type");
    if (boundaryRe.test(contentType)) {
      return contentType.match(boundaryRe)[1];
    }
    // Temporary workaround. As of 2014-03-11 the requestHeaders array does not
    // always contain the Content-Type header for mulitpart requests. See bug 978144.
    // Find the header from the request payload.
    let boundaryString = data.postDataText.match(boundaryRe)[1];
    if (boundaryString) {
      return boundaryString;
    }

    return null;
  },

  /**
   * Removes the binary data from multipart text.
   *
   * @param string multipartText
   *        Multipart form data text.
   * @param string boundary
   *        The boundary string.
   * @return string
   *         The multipart text without the binary data.
   */
  removeBinaryDataFromMultipartText: function (multipartText, boundary) {
    let result = "";
    boundary = "--" + boundary;
    let parts = multipartText.split(boundary);
    for (let part of parts) {
      // Each part is expected to have a content disposition line.
      let contentDispositionLine = part.trimLeft().split("\r\n")[0];
      if (!contentDispositionLine) {
        continue;
      }
      contentDispositionLine = contentDispositionLine.toLowerCase();
      if (contentDispositionLine.includes("content-disposition: form-data")) {
        if (contentDispositionLine.includes("filename=")) {
          // The header lines and the binary blob is separated by 2 CRLF's.
          // Add only the headers to the result.
          let headers = part.split("\r\n\r\n")[0];
          result += boundary + "\r\n" + headers + "\r\n\r\n";
        } else {
          result += boundary + "\r\n" + part;
        }
      }
    }
    result += boundary + "--\r\n";

    return result;
  },

  /**
   * Get the headers from a multipart post data text.
   *
   * @param string multipartText
   *        Multipart post text.
   * @return array
   *         An array of header objects {name:x, value:x}
   */
  getHeadersFromMultipartText: function (multipartText) {
    let headers = [];
    if (!multipartText || multipartText.startsWith("---")) {
      return headers;
    }

    // Get the header section.
    let index = multipartText.indexOf("\r\n\r\n");
    if (index == -1) {
      return headers;
    }

    // Parse the header lines.
    let headersText = multipartText.substring(0, index);
    let headerLines = headersText.split("\r\n");
    let lastHeaderName = null;

    for (let line of headerLines) {
      // Create a header for each line in fields that spans across multiple lines.
      // Subsquent lines always begins with at least one space or tab character.
      // (rfc2616)
      if (lastHeaderName && /^\s+/.test(line)) {
        headers.push({ name: lastHeaderName, value: line.trim() });
        continue;
      }

      let indexOfColon = line.indexOf(":");
      if (indexOfColon == -1) {
        continue;
      }

      let header = [line.slice(0, indexOfColon), line.slice(indexOfColon + 1)];
      if (header.length != 2) {
        continue;
      }
      lastHeaderName = header[0].trim();
      headers.push({ name: lastHeaderName, value: header[1].trim() });
    }

    return headers;
  },

  /**
   * Escape util function for POSIX oriented operating systems.
   * Credit: Google DevTools
   */
  escapeStringPosix: function (str) {
    function escapeCharacter(x) {
      let code = x.charCodeAt(0);
      if (code < 256) {
        // Add leading zero when needed to not care about the next character.
        return code < 16 ? "\\x0" + code.toString(16) : "\\x" + code.toString(16);
      }
      code = code.toString(16);
      return "\\u" + ("0000" + code).substr(code.length, 4);
    }

    if (/[^\x20-\x7E]|\'/.test(str)) {
      // Use ANSI-C quoting syntax.
      return "$\'" + str.replace(/\\/g, "\\\\")
                        .replace(/\'/g, "\\\'")
                        .replace(/\n/g, "\\n")
                        .replace(/\r/g, "\\r")
                        .replace(/!/g, "\\041")
                        .replace(/[^\x20-\x7E]/g, escapeCharacter) + "'";
    }

    // Use single quote syntax.
    return "'" + str + "'";
  },

  /**
   * Escape util function for Windows systems.
   * Credit: Google DevTools
   */
  escapeStringWin: function (str) {
    /* Replace quote by double quote (but not by \") because it is
       recognized by both cmd.exe and MS Crt arguments parser.

       Replace % by "%" because it could be expanded to an environment
       variable value. So %% becomes "%""%". Even if an env variable ""
       (2 doublequotes) is declared, the cmd.exe will not
       substitute it with its value.

       Replace each backslash with double backslash to make sure
       MS Crt arguments parser won't collapse them.

       Replace new line outside of quotes since cmd.exe doesn't let
       to do it inside.
    */
    return "\"" + str.replace(/"/g, "\"\"")
                     .replace(/%/g, "\"%\"")
                     .replace(/\\/g, "\\\\")
                     .replace(/[\r\n]+/g, "\"^$&\"") + "\"";
  }
};

exports.CurlUtils = CurlUtils;