adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 1 | // Copyright (c) 2009 The Chromium OS Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | // This file implements a simple HTTP server. It can exhibit odd behavior |
| 6 | // that's useful for testing. For example, it's useful to test that |
| 7 | // the updater can continue a connection if it's dropped, or that it |
| 8 | // handles very slow data transfers. |
| 9 | |
| 10 | // To use this, simply make an HTTP connection to localhost:port and |
| 11 | // GET a url. |
| 12 | |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 13 | #include <errno.h> |
Andrew de los Reyes | 08c4e27 | 2010-04-15 14:02:17 -0700 | [diff] [blame] | 14 | #include <inttypes.h> |
Andrew de los Reyes | 3fd5d30 | 2010-10-07 20:07:18 -0700 | [diff] [blame] | 15 | #include <netinet/in.h> |
| 16 | #include <signal.h> |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 17 | #include <stdio.h> |
| 18 | #include <stdlib.h> |
| 19 | #include <string.h> |
Andrew de los Reyes | 3fd5d30 | 2010-10-07 20:07:18 -0700 | [diff] [blame] | 20 | #include <sys/socket.h> |
| 21 | #include <sys/types.h> |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 22 | #include <unistd.h> |
Andrew de los Reyes | 3fd5d30 | 2010-10-07 20:07:18 -0700 | [diff] [blame] | 23 | |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 24 | #include <algorithm> |
| 25 | #include <string> |
| 26 | #include <vector> |
Andrew de los Reyes | 3fd5d30 | 2010-10-07 20:07:18 -0700 | [diff] [blame] | 27 | |
| 28 | #include <base/logging.h> |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 29 | #include <base/string_split.h> |
| 30 | #include <base/string_util.h> |
| 31 | |
| 32 | #include "update_engine/http_common.h" |
| 33 | #include "update_engine/http_fetcher_unittest.h" |
| 34 | |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 35 | |
| 36 | using std::min; |
| 37 | using std::string; |
| 38 | using std::vector; |
| 39 | |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 40 | |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 41 | namespace chromeos_update_engine { |
| 42 | |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 43 | // HTTP end-of-line delimiter; sorry, this needs to be a macro. |
| 44 | #define EOL "\r\n" |
| 45 | |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 46 | struct HttpRequest { |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 47 | HttpRequest() : start_offset(0), return_code(kHttpResponseOk) {} |
Darin Petkov | 41c2fcf | 2010-08-25 13:14:48 -0700 | [diff] [blame] | 48 | string host; |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 49 | string url; |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 50 | off_t start_offset; |
| 51 | HttpResponseCode return_code; |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 52 | }; |
| 53 | |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 54 | bool ParseRequest(int fd, HttpRequest* request) { |
| 55 | string headers; |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 56 | do { |
| 57 | char buf[1024]; |
| 58 | ssize_t r = read(fd, buf, sizeof(buf)); |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 59 | if (r < 0) { |
| 60 | perror("read"); |
| 61 | exit(1); |
| 62 | } |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 63 | headers.append(buf, r); |
| 64 | } while (!EndsWith(headers, EOL EOL, true)); |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 65 | |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 66 | LOG(INFO) << "got headers:\n--8<------8<------8<------8<----\n" |
| 67 | << headers |
| 68 | << "\n--8<------8<------8<------8<----"; |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 69 | |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 70 | // Break header into lines. |
| 71 | std::vector<string> lines; |
| 72 | base::SplitStringUsingSubstr( |
| 73 | headers.substr(0, headers.length() - strlen(EOL EOL)), EOL, &lines); |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 74 | |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 75 | // Decode URL line. |
| 76 | std::vector<string> terms; |
| 77 | base::SplitStringAlongWhitespace(lines[0], &terms); |
| 78 | CHECK_EQ(terms.size(), 3); |
| 79 | CHECK_EQ(terms[0], "GET"); |
| 80 | request->url = terms[1]; |
| 81 | LOG(INFO) << "URL: " << request->url; |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 82 | |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 83 | // Decode remaining lines. |
| 84 | size_t i; |
| 85 | for (i = 1; i < lines.size(); i++) { |
| 86 | std::vector<string> terms; |
| 87 | base::SplitStringAlongWhitespace(lines[i], &terms); |
Darin Petkov | 41c2fcf | 2010-08-25 13:14:48 -0700 | [diff] [blame] | 88 | |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 89 | if (terms[0] == "Range:") { |
| 90 | CHECK_EQ(terms.size(), 2); |
| 91 | string &range = terms[1]; |
| 92 | LOG(INFO) << "range attribute: " << range; |
| 93 | CHECK(StartsWithASCII(range, "bytes=", true) && |
| 94 | EndsWith(range, "-", true)); |
| 95 | request->start_offset = atoll(range.c_str() + strlen("bytes=")); |
| 96 | request->return_code = kHttpResponsePartialContent; |
| 97 | LOG(INFO) << "decoded start offset: " << request->start_offset; |
| 98 | } else if (terms[0] == "Host:") { |
| 99 | CHECK_EQ(terms.size(), 2); |
| 100 | request->host = terms[1]; |
| 101 | LOG(INFO) << "host attribute: " << request->host; |
| 102 | } else { |
| 103 | LOG(WARNING) << "ignoring HTTP attribute: `" << lines[i] << "'"; |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 104 | } |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 105 | } |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 106 | |
Andrew de los Reyes | 3fd5d30 | 2010-10-07 20:07:18 -0700 | [diff] [blame] | 107 | return true; |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | string Itoa(off_t num) { |
| 111 | char buf[100] = {0}; |
Andrew de los Reyes | 08c4e27 | 2010-04-15 14:02:17 -0700 | [diff] [blame] | 112 | snprintf(buf, sizeof(buf), "%" PRIi64, num); |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 113 | return buf; |
| 114 | } |
| 115 | |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 116 | // Writes a string into a file. Returns total number of bytes written or -1 if a |
| 117 | // write error occurred. |
| 118 | ssize_t WriteString(int fd, const string& str) { |
| 119 | const size_t total_size = str.size(); |
| 120 | size_t remaining_size = total_size; |
| 121 | char const *data = str.data(); |
Gilad Arnold | 48085ba | 2011-11-16 09:36:08 -0800 | [diff] [blame] | 122 | |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 123 | while (remaining_size) { |
| 124 | ssize_t written = write(fd, data, remaining_size); |
| 125 | if (written < 0) { |
| 126 | perror("write"); |
| 127 | LOG(INFO) << "write failed"; |
| 128 | return -1; |
| 129 | } |
| 130 | data += written; |
| 131 | remaining_size -= written; |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 132 | } |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 133 | |
| 134 | return total_size; |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 135 | } |
| 136 | |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 137 | // Writes the headers of an HTTP response into a file. |
| 138 | ssize_t WriteHeaders(int fd, const off_t start_offset, const off_t end_offset, |
| 139 | HttpResponseCode return_code) { |
| 140 | ssize_t written = 0, ret; |
| 141 | |
| 142 | ret = WriteString(fd, |
| 143 | string("HTTP/1.1 ") + Itoa(return_code) + " " + |
| 144 | GetHttpResponseDescription(return_code) + |
| 145 | EOL |
| 146 | "Content-Type: application/octet-stream" EOL); |
| 147 | if (ret < 0) |
| 148 | return -1; |
| 149 | written += ret; |
| 150 | |
| 151 | off_t content_length = end_offset; |
| 152 | if (start_offset) { |
| 153 | ret = WriteString(fd, |
| 154 | string("Accept-Ranges: bytes" EOL |
| 155 | "Content-Range: bytes ") + |
| 156 | Itoa(start_offset) + "-" + Itoa(end_offset - 1) + "/" + |
| 157 | Itoa(end_offset) + EOL); |
| 158 | if (ret < 0) |
| 159 | return -1; |
| 160 | written += ret; |
| 161 | |
| 162 | content_length -= start_offset; |
| 163 | } |
| 164 | |
| 165 | ret = WriteString(fd, string("Content-Length: ") + Itoa(content_length) + |
| 166 | EOL EOL); |
| 167 | if (ret < 0) |
| 168 | return -1; |
| 169 | written += ret; |
| 170 | |
| 171 | return written; |
| 172 | } |
| 173 | |
| 174 | // Writes a predetermined payload of lines of ascending bytes to a file. The |
| 175 | // first byte of output is appropriately offset with respect to the request line |
| 176 | // length. Returns the number of successfully written bytes. |
| 177 | size_t WritePayload(int fd, const off_t start_offset, const off_t end_offset, |
| 178 | const char first_byte, const size_t line_len) { |
| 179 | CHECK_LE(start_offset, end_offset); |
| 180 | CHECK_GT(line_len, 0); |
| 181 | |
| 182 | LOG(INFO) << "writing payload: " << line_len << " byte lines starting with `" |
| 183 | << first_byte << "', offset range " << start_offset << " -> " |
| 184 | << end_offset; |
| 185 | |
| 186 | // Populate line of ascending characters. |
| 187 | string line; |
| 188 | line.reserve(line_len); |
| 189 | char byte = first_byte; |
| 190 | size_t i; |
| 191 | for (i = 0; i < line_len; i++) |
| 192 | line += byte++; |
| 193 | |
| 194 | const size_t total_len = end_offset - start_offset; |
| 195 | size_t remaining_len = total_len; |
| 196 | bool success = true; |
| 197 | |
| 198 | // If start offset is not aligned with line boundary, output partial line up |
| 199 | // to the first line boundary. |
| 200 | size_t start_modulo = start_offset % line_len; |
| 201 | if (start_modulo) { |
| 202 | string partial = line.substr(start_modulo, remaining_len); |
| 203 | ssize_t ret = WriteString(fd, partial); |
| 204 | if ((success = (ret >= 0 && (size_t) ret == partial.length()))) |
| 205 | remaining_len -= partial.length(); |
| 206 | } |
| 207 | |
| 208 | // Output full lines up to the maximal line boundary below the end offset. |
| 209 | while (success && remaining_len >= line_len) { |
| 210 | ssize_t ret = WriteString(fd, line); |
| 211 | if ((success = (ret >= 0 && (size_t) ret == line_len))) |
| 212 | remaining_len -= line_len; |
| 213 | } |
| 214 | |
| 215 | // Output a partial line up to the end offset. |
| 216 | if (success && remaining_len) { |
| 217 | string partial = line.substr(0, remaining_len); |
| 218 | ssize_t ret = WriteString(fd, partial); |
| 219 | if ((success = (ret >= 0 && (size_t) ret == partial.length()))) |
| 220 | remaining_len -= partial.length(); |
| 221 | } |
| 222 | |
| 223 | return (total_len - remaining_len); |
| 224 | } |
| 225 | |
| 226 | // Write default payload lines of the form 'abcdefghij'. |
| 227 | inline size_t WritePayload(int fd, const off_t start_offset, |
| 228 | const off_t end_offset) { |
| 229 | return WritePayload(fd, start_offset, end_offset, 'a', 10); |
| 230 | } |
| 231 | |
| 232 | // Send an empty response, then kill the server. |
| 233 | void HandleQuit(int fd) { |
| 234 | WriteHeaders(fd, 0, 0, kHttpResponseOk); |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 235 | exit(0); |
| 236 | } |
| 237 | |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 238 | |
| 239 | // Generates an HTTP response with payload corresponding to given offset and |
| 240 | // length. Returns the total number of bytes delivered or -1 for error. |
| 241 | ssize_t HandleGet(int fd, const HttpRequest& request, const off_t end_offset) { |
| 242 | LOG(INFO) << "starting payload"; |
| 243 | ssize_t written = 0, ret; |
| 244 | |
| 245 | if ((ret = WriteHeaders(fd, request.start_offset, end_offset, |
| 246 | request.return_code)) < 0) |
| 247 | return -1; |
| 248 | written += ret; |
| 249 | |
| 250 | if ((ret = WritePayload(fd, request.start_offset, end_offset)) < 0) |
| 251 | return -1; |
| 252 | written += ret; |
| 253 | |
| 254 | LOG(INFO) << "payload writing completed, " << written << " bytes written"; |
| 255 | return written; |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 256 | } |
| 257 | |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 258 | |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 259 | // Generates an HTTP response with payload. Payload is truncated at a given |
| 260 | // length. Transfer may include an optional delay midway. |
| 261 | ssize_t HandleFlakyGet(int fd, const HttpRequest& request, |
| 262 | const off_t max_end_offset, const off_t truncate_length, |
| 263 | const int sleep_every, const int sleep_secs) { |
| 264 | CHECK_GT(truncate_length, 0); |
| 265 | CHECK_GT(sleep_every, 0); |
| 266 | CHECK_GE(sleep_secs, 0); |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 267 | |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 268 | ssize_t ret; |
| 269 | size_t written = 0; |
| 270 | const off_t start_offset = request.start_offset; |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 271 | |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 272 | if ((ret = WriteHeaders(fd, start_offset, max_end_offset, |
| 273 | request.return_code)) < 0) |
| 274 | return -1; |
| 275 | |
| 276 | const size_t content_length = |
| 277 | min(truncate_length, max_end_offset - start_offset); |
| 278 | const off_t end_offset = start_offset + content_length; |
| 279 | |
| 280 | if (start_offset % (truncate_length * sleep_every) == 0) { |
| 281 | const size_t midway_content_length = content_length / 2; |
| 282 | const off_t midway_offset = start_offset + midway_content_length; |
| 283 | |
| 284 | LOG(INFO) << "writing small data blob of size " << midway_content_length; |
| 285 | if ((ret = WritePayload(fd, start_offset, midway_offset)) < 0) |
| 286 | return -1; |
| 287 | written += ret; |
| 288 | |
| 289 | sleep(sleep_secs); |
| 290 | |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 291 | LOG(INFO) << "writing small data blob of size " |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 292 | << (content_length - midway_content_length); |
| 293 | if ((ret = WritePayload(fd, midway_offset, end_offset)) < 0) |
| 294 | return -1; |
| 295 | written += ret; |
| 296 | } else { |
| 297 | LOG(INFO) << "writing data blob of size " << content_length; |
| 298 | if ((ret = WritePayload(fd, start_offset, end_offset)) < 0) |
| 299 | return -1; |
| 300 | written += ret; |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 301 | } |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 302 | |
| 303 | return written; |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 304 | } |
| 305 | |
Darin Petkov | 41c2fcf | 2010-08-25 13:14:48 -0700 | [diff] [blame] | 306 | // Handles /redirect/<code>/<url> requests by returning the specified |
| 307 | // redirect <code> with a location pointing to /<url>. |
| 308 | void HandleRedirect(int fd, const HttpRequest& request) { |
| 309 | LOG(INFO) << "Redirecting..."; |
| 310 | string url = request.url; |
| 311 | CHECK_EQ(0, url.find("/redirect/")); |
| 312 | url.erase(0, strlen("/redirect/")); |
| 313 | string::size_type url_start = url.find('/'); |
| 314 | CHECK_NE(url_start, string::npos); |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 315 | HttpResponseCode code = StringToHttpResponseCode(url.c_str()); |
Darin Petkov | 41c2fcf | 2010-08-25 13:14:48 -0700 | [diff] [blame] | 316 | url.erase(0, url_start); |
| 317 | url = "http://" + request.host + url; |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 318 | const char *status = GetHttpResponseDescription(code); |
| 319 | if (!status) |
Darin Petkov | 41c2fcf | 2010-08-25 13:14:48 -0700 | [diff] [blame] | 320 | CHECK(false) << "Unrecognized redirection code: " << code; |
Darin Petkov | 41c2fcf | 2010-08-25 13:14:48 -0700 | [diff] [blame] | 321 | LOG(INFO) << "Code: " << code << " " << status; |
| 322 | LOG(INFO) << "New URL: " << url; |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 323 | |
| 324 | ssize_t ret; |
| 325 | if ((ret = WriteString(fd, "HTTP/1.1 " + Itoa(code) + " " + |
| 326 | status + EOL)) < 0) |
| 327 | return; |
| 328 | WriteString(fd, "Location: " + url + EOL); |
| 329 | } |
| 330 | |
| 331 | // Generate a page not found error response with actual text payload. Return |
| 332 | // number of bytes written or -1 for error. |
| 333 | ssize_t HandleError(int fd, const HttpRequest& request) { |
| 334 | LOG(INFO) << "Generating error HTTP response"; |
| 335 | |
| 336 | ssize_t ret; |
| 337 | size_t written = 0; |
| 338 | |
| 339 | const string data("This is an error page."); |
| 340 | |
| 341 | if ((ret = WriteHeaders(fd, 0, data.size(), kHttpResponseNotFound)) < 0) |
| 342 | return -1; |
| 343 | written += ret; |
| 344 | |
| 345 | if ((ret = WriteString(fd, data)) < 0) |
| 346 | return -1; |
| 347 | written += ret; |
| 348 | |
| 349 | return written; |
| 350 | } |
| 351 | |
| 352 | // Generate an error response if the requested offset is nonzero, up to a given |
| 353 | // maximal number of successive failures. The error generated is an "Internal |
| 354 | // Server Error" (500). |
| 355 | ssize_t HandleErrorIfOffset(int fd, const HttpRequest& request, |
| 356 | size_t end_offset, int max_fails) { |
| 357 | static int num_fails = 0; |
| 358 | |
| 359 | if (request.start_offset > 0 && num_fails < max_fails) { |
| 360 | LOG(INFO) << "Generating error HTTP response"; |
| 361 | |
| 362 | ssize_t ret; |
| 363 | size_t written = 0; |
| 364 | |
| 365 | const string data("This is an error page."); |
| 366 | |
| 367 | if ((ret = WriteHeaders(fd, 0, data.size(), |
| 368 | kHttpResponseInternalServerError)) < 0) |
| 369 | return -1; |
| 370 | written += ret; |
| 371 | |
| 372 | if ((ret = WriteString(fd, data)) < 0) |
| 373 | return -1; |
| 374 | written += ret; |
| 375 | |
| 376 | num_fails++; |
| 377 | return written; |
| 378 | } else { |
| 379 | num_fails = 0; |
| 380 | return HandleGet(fd, request, end_offset); |
| 381 | } |
Darin Petkov | 41c2fcf | 2010-08-25 13:14:48 -0700 | [diff] [blame] | 382 | } |
| 383 | |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 384 | void HandleDefault(int fd, const HttpRequest& request) { |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 385 | const off_t start_offset = request.start_offset; |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 386 | const string data("unhandled path"); |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 387 | const size_t size = data.size(); |
| 388 | ssize_t ret; |
| 389 | |
| 390 | if ((ret = WriteHeaders(fd, start_offset, size, request.return_code)) < 0) |
| 391 | return; |
| 392 | WriteString(fd, (start_offset < static_cast<off_t>(size) ? |
| 393 | data.substr(start_offset) : "")); |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 394 | } |
| 395 | |
Gilad Arnold | 48085ba | 2011-11-16 09:36:08 -0800 | [diff] [blame] | 396 | |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 397 | // Break a URL into terms delimited by slashes. |
| 398 | class UrlTerms { |
| 399 | public: |
| 400 | UrlTerms(string &url, size_t num_terms) { |
| 401 | // URL must be non-empty and start with a slash. |
| 402 | CHECK_GT(url.size(), 0); |
| 403 | CHECK_EQ(url[0], '/'); |
| 404 | |
| 405 | // Split it into terms delimited by slashes, omitting the preceeding slash. |
| 406 | base::SplitStringDontTrim(url.substr(1), '/', &terms); |
| 407 | |
| 408 | // Ensure expected length. |
| 409 | CHECK_EQ(terms.size(), num_terms); |
| 410 | } |
| 411 | |
| 412 | inline string Get(const off_t index) const { |
| 413 | return terms[index]; |
| 414 | } |
| 415 | inline const char *GetCStr(const off_t index) const { |
| 416 | return Get(index).c_str(); |
| 417 | } |
| 418 | inline int GetInt(const off_t index) const { |
| 419 | return atoi(GetCStr(index)); |
| 420 | } |
| 421 | inline long GetLong(const off_t index) const { |
| 422 | return atol(GetCStr(index)); |
| 423 | } |
| 424 | |
| 425 | private: |
| 426 | std::vector<string> terms; |
| 427 | }; |
Gilad Arnold | 48085ba | 2011-11-16 09:36:08 -0800 | [diff] [blame] | 428 | |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 429 | void HandleConnection(int fd) { |
| 430 | HttpRequest request; |
| 431 | ParseRequest(fd, &request); |
| 432 | |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 433 | string &url = request.url; |
| 434 | if (url == "/quitquitquit") { |
| 435 | HandleQuit(fd); |
| 436 | } else if (StartsWithASCII(url, "/download/", true)) { |
| 437 | const UrlTerms terms(url, 2); |
| 438 | HandleGet(fd, request, terms.GetLong(1)); |
| 439 | } else if (StartsWithASCII(url, "/flaky/", true)) { |
| 440 | const UrlTerms terms(url, 5); |
| 441 | HandleFlakyGet(fd, request, terms.GetLong(1), terms.GetLong(2), |
| 442 | terms.GetLong(3), terms.GetLong(4)); |
| 443 | } else if (url.find("/redirect/") == 0) { |
Darin Petkov | 41c2fcf | 2010-08-25 13:14:48 -0700 | [diff] [blame] | 444 | HandleRedirect(fd, request); |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 445 | } else if (url == "/error") { |
Gilad Arnold | 48085ba | 2011-11-16 09:36:08 -0800 | [diff] [blame] | 446 | HandleError(fd, request); |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 447 | } else if (StartsWithASCII(url, "/error-if-offset/", true)) { |
| 448 | const UrlTerms terms(url, 3); |
| 449 | HandleErrorIfOffset(fd, request, terms.GetLong(1), terms.GetInt(2)); |
| 450 | } else { |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 451 | HandleDefault(fd, request); |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 452 | } |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 453 | |
| 454 | close(fd); |
| 455 | } |
| 456 | |
| 457 | } // namespace chromeos_update_engine |
| 458 | |
| 459 | using namespace chromeos_update_engine; |
| 460 | |
| 461 | int main(int argc, char** argv) { |
Andrew de los Reyes | 3fd5d30 | 2010-10-07 20:07:18 -0700 | [diff] [blame] | 462 | // Ignore SIGPIPE on write() to sockets. |
| 463 | signal(SIGPIPE, SIG_IGN); |
Darin Petkov | f67bb1f | 2010-11-08 16:10:26 -0800 | [diff] [blame] | 464 | |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 465 | socklen_t clilen; |
| 466 | struct sockaddr_in server_addr; |
| 467 | struct sockaddr_in client_addr; |
| 468 | memset(&server_addr, 0, sizeof(server_addr)); |
| 469 | memset(&client_addr, 0, sizeof(client_addr)); |
| 470 | |
| 471 | int listen_fd = socket(AF_INET, SOCK_STREAM, 0); |
| 472 | if (listen_fd < 0) |
| 473 | LOG(FATAL) << "socket() failed"; |
| 474 | |
| 475 | server_addr.sin_family = AF_INET; |
| 476 | server_addr.sin_addr.s_addr = INADDR_ANY; |
Gilad Arnold | 9bedeb5 | 2011-11-17 16:19:57 -0800 | [diff] [blame] | 477 | server_addr.sin_port = htons(kServerPort); |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 478 | |
| 479 | { |
| 480 | // Get rid of "Address in use" error |
| 481 | int tr = 1; |
| 482 | if (setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, &tr, |
| 483 | sizeof(int)) == -1) { |
| 484 | perror("setsockopt"); |
| 485 | exit(1); |
| 486 | } |
| 487 | } |
| 488 | |
| 489 | if (bind(listen_fd, reinterpret_cast<struct sockaddr *>(&server_addr), |
| 490 | sizeof(server_addr)) < 0) { |
| 491 | perror("bind"); |
| 492 | exit(1); |
| 493 | } |
| 494 | CHECK_EQ(listen(listen_fd,5), 0); |
| 495 | while (1) { |
| 496 | clilen = sizeof(client_addr); |
| 497 | int client_fd = accept(listen_fd, |
| 498 | (struct sockaddr *) &client_addr, |
| 499 | &clilen); |
| 500 | LOG(INFO) << "got past accept"; |
| 501 | if (client_fd < 0) |
| 502 | LOG(FATAL) << "ERROR on accept"; |
| 503 | HandleConnection(client_fd); |
| 504 | } |
| 505 | return 0; |
| 506 | } |