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diff --git a/src/http.c b/src/http.c
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+++ b/src/http.c
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+/*
+ * HTTP semantics
+ *
+ * Copyright 2000-2018 Willy Tarreau <w@1wt.eu>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ */
+
+#include <ctype.h>
+#include <haproxy/api.h>
+#include <haproxy/http.h>
+#include <haproxy/tools.h>
+
+/* It is about twice as fast on recent architectures to lookup a byte in a
+ * table than to perform a boolean AND or OR between two tests. Refer to
+ * RFC2616/RFC5234/RFC7230 for those chars. A token is any ASCII char that is
+ * neither a separator nor a CTL char. An http ver_token is any ASCII which can
+ * be found in an HTTP version, which includes 'H', 'T', 'P', '/', '.' and any
+ * digit. Note: please do not overwrite values in assignment since gcc-2.95
+ * will not handle them correctly. It's worth noting that chars 128..255 are
+ * nothing, not even control chars.
+ */
+const unsigned char http_char_classes[256] = {
+ [ 0] = HTTP_FLG_CTL,
+ [ 1] = HTTP_FLG_CTL,
+ [ 2] = HTTP_FLG_CTL,
+ [ 3] = HTTP_FLG_CTL,
+ [ 4] = HTTP_FLG_CTL,
+ [ 5] = HTTP_FLG_CTL,
+ [ 6] = HTTP_FLG_CTL,
+ [ 7] = HTTP_FLG_CTL,
+ [ 8] = HTTP_FLG_CTL,
+ [ 9] = HTTP_FLG_SPHT | HTTP_FLG_LWS | HTTP_FLG_SEP | HTTP_FLG_CTL,
+ [ 10] = HTTP_FLG_CRLF | HTTP_FLG_LWS | HTTP_FLG_CTL,
+ [ 11] = HTTP_FLG_CTL,
+ [ 12] = HTTP_FLG_CTL,
+ [ 13] = HTTP_FLG_CRLF | HTTP_FLG_LWS | HTTP_FLG_CTL,
+ [ 14] = HTTP_FLG_CTL,
+ [ 15] = HTTP_FLG_CTL,
+ [ 16] = HTTP_FLG_CTL,
+ [ 17] = HTTP_FLG_CTL,
+ [ 18] = HTTP_FLG_CTL,
+ [ 19] = HTTP_FLG_CTL,
+ [ 20] = HTTP_FLG_CTL,
+ [ 21] = HTTP_FLG_CTL,
+ [ 22] = HTTP_FLG_CTL,
+ [ 23] = HTTP_FLG_CTL,
+ [ 24] = HTTP_FLG_CTL,
+ [ 25] = HTTP_FLG_CTL,
+ [ 26] = HTTP_FLG_CTL,
+ [ 27] = HTTP_FLG_CTL,
+ [ 28] = HTTP_FLG_CTL,
+ [ 29] = HTTP_FLG_CTL,
+ [ 30] = HTTP_FLG_CTL,
+ [ 31] = HTTP_FLG_CTL,
+ [' '] = HTTP_FLG_SPHT | HTTP_FLG_LWS | HTTP_FLG_SEP,
+ ['!'] = HTTP_FLG_TOK,
+ ['"'] = HTTP_FLG_SEP,
+ ['#'] = HTTP_FLG_TOK,
+ ['$'] = HTTP_FLG_TOK,
+ ['%'] = HTTP_FLG_TOK,
+ ['&'] = HTTP_FLG_TOK,
+ [ 39] = HTTP_FLG_TOK,
+ ['('] = HTTP_FLG_SEP,
+ [')'] = HTTP_FLG_SEP,
+ ['*'] = HTTP_FLG_TOK,
+ ['+'] = HTTP_FLG_TOK,
+ [','] = HTTP_FLG_SEP,
+ ['-'] = HTTP_FLG_TOK,
+ ['.'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['/'] = HTTP_FLG_SEP | HTTP_FLG_VER,
+ ['0'] = HTTP_FLG_TOK | HTTP_FLG_VER | HTTP_FLG_DIG,
+ ['1'] = HTTP_FLG_TOK | HTTP_FLG_VER | HTTP_FLG_DIG,
+ ['2'] = HTTP_FLG_TOK | HTTP_FLG_VER | HTTP_FLG_DIG,
+ ['3'] = HTTP_FLG_TOK | HTTP_FLG_VER | HTTP_FLG_DIG,
+ ['4'] = HTTP_FLG_TOK | HTTP_FLG_VER | HTTP_FLG_DIG,
+ ['5'] = HTTP_FLG_TOK | HTTP_FLG_VER | HTTP_FLG_DIG,
+ ['6'] = HTTP_FLG_TOK | HTTP_FLG_VER | HTTP_FLG_DIG,
+ ['7'] = HTTP_FLG_TOK | HTTP_FLG_VER | HTTP_FLG_DIG,
+ ['8'] = HTTP_FLG_TOK | HTTP_FLG_VER | HTTP_FLG_DIG,
+ ['9'] = HTTP_FLG_TOK | HTTP_FLG_VER | HTTP_FLG_DIG,
+ [':'] = HTTP_FLG_SEP,
+ [';'] = HTTP_FLG_SEP,
+ ['<'] = HTTP_FLG_SEP,
+ ['='] = HTTP_FLG_SEP,
+ ['>'] = HTTP_FLG_SEP,
+ ['?'] = HTTP_FLG_SEP,
+ ['@'] = HTTP_FLG_SEP,
+ ['A'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['B'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['C'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['D'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['E'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['F'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['G'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['H'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['I'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['J'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['K'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['L'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['M'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['N'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['O'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['P'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['Q'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['R'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['S'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['T'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['U'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['V'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['W'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['X'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['Y'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['Z'] = HTTP_FLG_TOK | HTTP_FLG_VER,
+ ['['] = HTTP_FLG_SEP,
+ [ 92] = HTTP_FLG_SEP,
+ [']'] = HTTP_FLG_SEP,
+ ['^'] = HTTP_FLG_TOK,
+ ['_'] = HTTP_FLG_TOK,
+ ['`'] = HTTP_FLG_TOK,
+ ['a'] = HTTP_FLG_TOK,
+ ['b'] = HTTP_FLG_TOK,
+ ['c'] = HTTP_FLG_TOK,
+ ['d'] = HTTP_FLG_TOK,
+ ['e'] = HTTP_FLG_TOK,
+ ['f'] = HTTP_FLG_TOK,
+ ['g'] = HTTP_FLG_TOK,
+ ['h'] = HTTP_FLG_TOK,
+ ['i'] = HTTP_FLG_TOK,
+ ['j'] = HTTP_FLG_TOK,
+ ['k'] = HTTP_FLG_TOK,
+ ['l'] = HTTP_FLG_TOK,
+ ['m'] = HTTP_FLG_TOK,
+ ['n'] = HTTP_FLG_TOK,
+ ['o'] = HTTP_FLG_TOK,
+ ['p'] = HTTP_FLG_TOK,
+ ['q'] = HTTP_FLG_TOK,
+ ['r'] = HTTP_FLG_TOK,
+ ['s'] = HTTP_FLG_TOK,
+ ['t'] = HTTP_FLG_TOK,
+ ['u'] = HTTP_FLG_TOK,
+ ['v'] = HTTP_FLG_TOK,
+ ['w'] = HTTP_FLG_TOK,
+ ['x'] = HTTP_FLG_TOK,
+ ['y'] = HTTP_FLG_TOK,
+ ['z'] = HTTP_FLG_TOK,
+ ['{'] = HTTP_FLG_SEP,
+ ['|'] = HTTP_FLG_TOK,
+ ['}'] = HTTP_FLG_SEP,
+ ['~'] = HTTP_FLG_TOK,
+ [127] = HTTP_FLG_CTL,
+};
+
+const int http_err_codes[HTTP_ERR_SIZE] = {
+ [HTTP_ERR_200] = 200, /* used by "monitor-uri" */
+ [HTTP_ERR_400] = 400,
+ [HTTP_ERR_401] = 401,
+ [HTTP_ERR_403] = 403,
+ [HTTP_ERR_404] = 404,
+ [HTTP_ERR_405] = 405,
+ [HTTP_ERR_407] = 407,
+ [HTTP_ERR_408] = 408,
+ [HTTP_ERR_410] = 410,
+ [HTTP_ERR_413] = 413,
+ [HTTP_ERR_421] = 421,
+ [HTTP_ERR_422] = 422,
+ [HTTP_ERR_425] = 425,
+ [HTTP_ERR_429] = 429,
+ [HTTP_ERR_500] = 500,
+ [HTTP_ERR_501] = 501,
+ [HTTP_ERR_502] = 502,
+ [HTTP_ERR_503] = 503,
+ [HTTP_ERR_504] = 504,
+};
+
+const char *http_err_msgs[HTTP_ERR_SIZE] = {
+ [HTTP_ERR_200] =
+ "HTTP/1.1 200 OK\r\n"
+ "Content-length: 58\r\n"
+ "Cache-Control: no-cache\r\n"
+ "Content-Type: text/html\r\n"
+ "\r\n"
+ "<html><body><h1>200 OK</h1>\nService ready.\n</body></html>\n",
+
+ [HTTP_ERR_400] =
+ "HTTP/1.1 400 Bad request\r\n"
+ "Content-length: 90\r\n"
+ "Cache-Control: no-cache\r\n"
+ "Connection: close\r\n"
+ "Content-Type: text/html\r\n"
+ "\r\n"
+ "<html><body><h1>400 Bad request</h1>\nYour browser sent an invalid request.\n</body></html>\n",
+
+ [HTTP_ERR_401] =
+ "HTTP/1.1 401 Unauthorized\r\n"
+ "Content-length: 112\r\n"
+ "Cache-Control: no-cache\r\n"
+ "Content-Type: text/html\r\n"
+ "\r\n"
+ "<html><body><h1>401 Unauthorized</h1>\nYou need a valid user and password to access this content.\n</body></html>\n",
+
+ [HTTP_ERR_403] =
+ "HTTP/1.1 403 Forbidden\r\n"
+ "Content-length: 93\r\n"
+ "Cache-Control: no-cache\r\n"
+ "Content-Type: text/html\r\n"
+ "\r\n"
+ "<html><body><h1>403 Forbidden</h1>\nRequest forbidden by administrative rules.\n</body></html>\n",
+
+ [HTTP_ERR_404] =
+ "HTTP/1.1 404 Not Found\r\n"
+ "Content-length: 83\r\n"
+ "Cache-Control: no-cache\r\n"
+ "Content-Type: text/html\r\n"
+ "\r\n"
+ "<html><body><h1>404 Not Found</h1>\nThe resource could not be found.\n</body></html>\n",
+
+ [HTTP_ERR_405] =
+ "HTTP/1.1 405 Method Not Allowed\r\n"
+ "Content-length: 146\r\n"
+ "Cache-Control: no-cache\r\n"
+ "Content-Type: text/html\r\n"
+ "\r\n"
+ "<html><body><h1>405 Method Not Allowed</h1>\nA request was made of a resource using a request method not supported by that resource\n</body></html>\n",
+
+ [HTTP_ERR_407] =
+ "HTTP/1.1 407 Unauthorized\r\n"
+ "Content-length: 112\r\n"
+ "Cache-Control: no-cache\r\n"
+ "Content-Type: text/html\r\n"
+ "\r\n"
+ "<html><body><h1>407 Unauthorized</h1>\nYou need a valid user and password to access this content.\n</body></html>\n",
+
+ [HTTP_ERR_408] =
+ "HTTP/1.1 408 Request Time-out\r\n"
+ "Content-length: 110\r\n"
+ "Cache-Control: no-cache\r\n"
+ "Connection: close\r\n"
+ "Content-Type: text/html\r\n"
+ "\r\n"
+ "<html><body><h1>408 Request Time-out</h1>\nYour browser didn't send a complete request in time.\n</body></html>\n",
+
+ [HTTP_ERR_410] =
+ "HTTP/1.1 410 Gone\r\n"
+ "Content-length: 114\r\n"
+ "Cache-Control: no-cache\r\n"
+ "Content-Type: text/html\r\n"
+ "\r\n"
+ "<html><body><h1>410 Gone</h1>\nThe resource is no longer available and will not be available again.\n</body></html>\n",
+
+ [HTTP_ERR_413] =
+ "HTTP/1.1 413 Payload Too Large\r\n"
+ "Content-length: 106\r\n"
+ "Cache-Control: no-cache\r\n"
+ "Content-Type: text/html\r\n"
+ "\r\n"
+ "<html><body><h1>413 Payload Too Large</h1>\nThe request entity exceeds the maximum allowed.\n</body></html>\n",
+
+ [HTTP_ERR_421] =
+ "HTTP/1.1 421 Misdirected Request\r\n"
+ "Content-length: 104\r\n"
+ "Cache-Control: no-cache\r\n"
+ "Content-Type: text/html\r\n"
+ "\r\n"
+ "<html><body><h1>421 Misdirected Request</h1>\nRequest sent to a non-authoritative server.\n</body></html>\n",
+
+ [HTTP_ERR_422] =
+ "HTTP/1.1 422 Unprocessable Content\r\n"
+ "Content-length: 116\r\n"
+ "Cache-Control: no-cache\r\n"
+ "Content-Type: text/html\r\n"
+ "\r\n"
+ "<html><body><h1>422 Unprocessable Content</h1>\nThe server cannot process the contained instructions.\n</body></html>\n",
+
+ [HTTP_ERR_425] =
+ "HTTP/1.1 425 Too Early\r\n"
+ "Content-length: 80\r\n"
+ "Cache-Control: no-cache\r\n"
+ "Content-Type: text/html\r\n"
+ "\r\n"
+ "<html><body><h1>425 Too Early</h1>\nYour browser sent early data.\n</body></html>\n",
+
+ [HTTP_ERR_429] =
+ "HTTP/1.1 429 Too Many Requests\r\n"
+ "Content-length: 117\r\n"
+ "Cache-Control: no-cache\r\n"
+ "Content-Type: text/html\r\n"
+ "\r\n"
+ "<html><body><h1>429 Too Many Requests</h1>\nYou have sent too many requests in a given amount of time.\n</body></html>\n",
+
+ [HTTP_ERR_500] =
+ "HTTP/1.1 500 Internal Server Error\r\n"
+ "Content-length: 97\r\n"
+ "Cache-Control: no-cache\r\n"
+ "Content-Type: text/html\r\n"
+ "\r\n"
+ "<html><body><h1>500 Internal Server Error</h1>\nAn internal server error occurred.\n</body></html>\n",
+
+ [HTTP_ERR_501] =
+ "HTTP/1.1 501 Not Implemented\r\n"
+ "Content-length: 136\r\n"
+ "Cache-Control: no-cache\r\n"
+ "Content-Type: text/html\r\n"
+ "\r\n"
+ "<html><body><h1>501 Not Implemented</h1>\n.The server does not support the functionality required to fulfill the request.\n</body></html>\n",
+
+ [HTTP_ERR_502] =
+ "HTTP/1.1 502 Bad Gateway\r\n"
+ "Content-length: 107\r\n"
+ "Cache-Control: no-cache\r\n"
+ "Content-Type: text/html\r\n"
+ "\r\n"
+ "<html><body><h1>502 Bad Gateway</h1>\nThe server returned an invalid or incomplete response.\n</body></html>\n",
+
+ [HTTP_ERR_503] =
+ "HTTP/1.1 503 Service Unavailable\r\n"
+ "Content-length: 107\r\n"
+ "Cache-Control: no-cache\r\n"
+ "Content-Type: text/html\r\n"
+ "\r\n"
+ "<html><body><h1>503 Service Unavailable</h1>\nNo server is available to handle this request.\n</body></html>\n",
+
+ [HTTP_ERR_504] =
+ "HTTP/1.1 504 Gateway Time-out\r\n"
+ "Content-length: 92\r\n"
+ "Cache-Control: no-cache\r\n"
+ "Content-Type: text/html\r\n"
+ "\r\n"
+ "<html><body><h1>504 Gateway Time-out</h1>\nThe server didn't respond in time.\n</body></html>\n",
+};
+
+const struct ist http_known_methods[HTTP_METH_OTHER] = {
+ [HTTP_METH_OPTIONS] = IST("OPTIONS"),
+ [HTTP_METH_GET] = IST("GET"),
+ [HTTP_METH_HEAD] = IST("HEAD"),
+ [HTTP_METH_POST] = IST("POST"),
+ [HTTP_METH_PUT] = IST("PUT"),
+ [HTTP_METH_DELETE] = IST("DELETE"),
+ [HTTP_METH_TRACE] = IST("TRACE"),
+ [HTTP_METH_CONNECT] = IST("CONNECT"),
+};
+
+/*
+ * returns a known method among HTTP_METH_* or HTTP_METH_OTHER for all unknown
+ * ones.
+ */
+enum http_meth_t find_http_meth(const char *str, const int len)
+{
+ const struct ist m = ist2(str, len);
+
+ if (isteq(m, ist("GET"))) return HTTP_METH_GET;
+ else if (isteq(m, ist("HEAD"))) return HTTP_METH_HEAD;
+ else if (isteq(m, ist("POST"))) return HTTP_METH_POST;
+ else if (isteq(m, ist("CONNECT"))) return HTTP_METH_CONNECT;
+ else if (isteq(m, ist("PUT"))) return HTTP_METH_PUT;
+ else if (isteq(m, ist("OPTIONS"))) return HTTP_METH_OPTIONS;
+ else if (isteq(m, ist("DELETE"))) return HTTP_METH_DELETE;
+ else if (isteq(m, ist("TRACE"))) return HTTP_METH_TRACE;
+ else return HTTP_METH_OTHER;
+}
+
+/* This function returns HTTP_ERR_<num> (enum) matching http status code.
+ * Returned value should match codes from http_err_codes.
+ */
+int http_get_status_idx(unsigned int status)
+{
+ switch (status) {
+ case 200: return HTTP_ERR_200;
+ case 400: return HTTP_ERR_400;
+ case 401: return HTTP_ERR_401;
+ case 403: return HTTP_ERR_403;
+ case 404: return HTTP_ERR_404;
+ case 405: return HTTP_ERR_405;
+ case 407: return HTTP_ERR_407;
+ case 408: return HTTP_ERR_408;
+ case 410: return HTTP_ERR_410;
+ case 413: return HTTP_ERR_413;
+ case 421: return HTTP_ERR_421;
+ case 422: return HTTP_ERR_422;
+ case 425: return HTTP_ERR_425;
+ case 429: return HTTP_ERR_429;
+ case 500: return HTTP_ERR_500;
+ case 501: return HTTP_ERR_501;
+ case 502: return HTTP_ERR_502;
+ case 503: return HTTP_ERR_503;
+ case 504: return HTTP_ERR_504;
+ default: return HTTP_ERR_500;
+ }
+}
+
+/* This function returns a reason associated with the HTTP status.
+ * This function never fails, a message is always returned.
+ */
+const char *http_get_reason(unsigned int status)
+{
+ switch (status) {
+ case 100: return "Continue";
+ case 101: return "Switching Protocols";
+ case 102: return "Processing";
+ case 200: return "OK";
+ case 201: return "Created";
+ case 202: return "Accepted";
+ case 203: return "Non-Authoritative Information";
+ case 204: return "No Content";
+ case 205: return "Reset Content";
+ case 206: return "Partial Content";
+ case 207: return "Multi-Status";
+ case 210: return "Content Different";
+ case 226: return "IM Used";
+ case 300: return "Multiple Choices";
+ case 301: return "Moved Permanently";
+ case 302: return "Found";
+ case 303: return "See Other";
+ case 304: return "Not Modified";
+ case 305: return "Use Proxy";
+ case 307: return "Temporary Redirect";
+ case 308: return "Permanent Redirect";
+ case 310: return "Too many Redirects";
+ case 400: return "Bad Request";
+ case 401: return "Unauthorized";
+ case 402: return "Payment Required";
+ case 403: return "Forbidden";
+ case 404: return "Not Found";
+ case 405: return "Method Not Allowed";
+ case 406: return "Not Acceptable";
+ case 407: return "Proxy Authentication Required";
+ case 408: return "Request Time-out";
+ case 409: return "Conflict";
+ case 410: return "Gone";
+ case 411: return "Length Required";
+ case 412: return "Precondition Failed";
+ case 413: return "Request Entity Too Large";
+ case 414: return "Request-URI Too Long";
+ case 415: return "Unsupported Media Type";
+ case 416: return "Requested range unsatisfiable";
+ case 417: return "Expectation failed";
+ case 418: return "I'm a teapot";
+ case 421: return "Misdirected Request";
+ case 422: return "Unprocessable Content";
+ case 423: return "Locked";
+ case 424: return "Method failure";
+ case 425: return "Too Early";
+ case 426: return "Upgrade Required";
+ case 428: return "Precondition Required";
+ case 429: return "Too Many Requests";
+ case 431: return "Request Header Fields Too Large";
+ case 449: return "Retry With";
+ case 450: return "Blocked by Windows Parental Controls";
+ case 451: return "Unavailable For Legal Reasons";
+ case 456: return "Unrecoverable Error";
+ case 499: return "client has closed connection";
+ case 500: return "Internal Server Error";
+ case 501: return "Not Implemented";
+ case 502: return "Bad Gateway or Proxy Error";
+ case 503: return "Service Unavailable";
+ case 504: return "Gateway Time-out";
+ case 505: return "HTTP Version not supported";
+ case 506: return "Variant also negotiate";
+ case 507: return "Insufficient storage";
+ case 508: return "Loop detected";
+ case 509: return "Bandwidth Limit Exceeded";
+ case 510: return "Not extended";
+ case 511: return "Network authentication required";
+ case 520: return "Web server is returning an unknown error";
+ default:
+ switch (status) {
+ case 100 ... 199: return "Informational";
+ case 200 ... 299: return "Success";
+ case 300 ... 399: return "Redirection";
+ case 400 ... 499: return "Client Error";
+ case 500 ... 599: return "Server Error";
+ default: return "Other";
+ }
+ }
+}
+
+/* Returns the ist string corresponding to port part (without ':') in the host
+ * <host>, IST_NULL if no ':' is found or an empty IST if there is no digit. In
+ * the last case, the result is the original ist trimmed to 0. So be sure to test
+ * the result length before doing any pointer arithmetic.
+*/
+struct ist http_get_host_port(const struct ist host)
+{
+ char *start, *end, *ptr;
+
+ start = istptr(host);
+ end = istend(host);
+ for (ptr = end; ptr > start && isdigit((unsigned char)*--ptr););
+
+ /* no port found */
+ if (likely(*ptr != ':'))
+ return IST_NULL;
+ if (ptr+1 == end)
+ return isttrim(host, 0);
+
+ return istnext(ist2(ptr, end - ptr));
+}
+
+
+/* Return non-zero if the port <port> is a default port. If the scheme <schm> is
+ * set, it is used to detect default ports (HTTP => 80 and HTTPS => 443)
+ * port. Otherwise, both are considered as default ports.
+ */
+int http_is_default_port(const struct ist schm, const struct ist port)
+{
+ if (!istlen(port))
+ return 1;
+
+ if (!isttest(schm))
+ return (isteq(port, ist("443")) || isteq(port, ist("80")));
+ else
+ return (isteq(port, ist("443")) && isteqi(schm, ist("https://"))) ||
+ (isteq(port, ist("80")) && isteqi(schm, ist("http://")));
+}
+
+/* Returns non-zero if the scheme <schm> is syntactically correct according to
+ * RFC3986#3.1, otherwise zero. It expects only the scheme and nothing else
+ * (particularly not the following "://").
+ * Scheme = alpha *(alpha|digit|'+'|'-'|'.')
+ */
+int http_validate_scheme(const struct ist schm)
+{
+ size_t i;
+
+ for (i = 0; i < schm.len; i++) {
+ if (likely((schm.ptr[i] >= 'a' && schm.ptr[i] <= 'z') ||
+ (schm.ptr[i] >= 'A' && schm.ptr[i] <= 'Z')))
+ continue;
+ if (unlikely(!i)) // first char must be alpha
+ return 0;
+ if ((schm.ptr[i] >= '0' && schm.ptr[i] <= '9') ||
+ schm.ptr[i] == '+' || schm.ptr[i] == '-' || schm.ptr[i] == '.')
+ continue;
+ return 0;
+ }
+ return !!i;
+}
+
+/* Parse the uri and looks for the scheme. If not found, an empty ist is
+ * returned. Otherwise, the ist pointing to the scheme is returned.
+ *
+ * <parser> must have been initialized via http_uri_parser_init. See the
+ * related http_uri_parser documentation for the specific API usage.
+ */
+struct ist http_parse_scheme(struct http_uri_parser *parser)
+{
+ const char *ptr, *start, *end;
+
+ if (parser->state >= URI_PARSER_STATE_SCHEME_DONE)
+ goto not_found;
+
+ if (parser->format != URI_PARSER_FORMAT_ABSURI_OR_AUTHORITY)
+ goto not_found;
+
+ ptr = start = istptr(parser->uri);
+ end = istend(parser->uri);
+
+ if (isalpha((unsigned char)*ptr)) {
+ /* this is a scheme as described by RFC3986, par. 3.1, or only
+ * an authority (in case of a CONNECT method).
+ */
+ ptr++;
+ /* retrieve the scheme up to the suffix '://'. If the suffix is
+ * not found, this means there is no scheme and it is an
+ * authority-only uri.
+ */
+ while (ptr < end &&
+ (isalnum((unsigned char)*ptr) || *ptr == '+' || *ptr == '-' || *ptr == '.'))
+ ptr++;
+ if (ptr == end || *ptr++ != ':')
+ goto not_found;
+ if (ptr == end || *ptr++ != '/')
+ goto not_found;
+ if (ptr == end || *ptr++ != '/')
+ goto not_found;
+ }
+ else {
+ goto not_found;
+ }
+
+ parser->uri = ist2(ptr, end - ptr);
+ parser->state = URI_PARSER_STATE_SCHEME_DONE;
+ return ist2(start, ptr - start);
+
+ not_found:
+ parser->state = URI_PARSER_STATE_SCHEME_DONE;
+ return IST_NULL;
+}
+
+/* Parse the uri and looks for the authority, between the scheme and the
+ * path. if no_userinfo is not zero, the part before the '@' (including it) is
+ * skipped. If not found, an empty ist is returned. Otherwise, the ist pointing
+ * on the authority is returned.
+ *
+ * <parser> must have been initialized via http_uri_parser_init. See the
+ * related http_uri_parser documentation for the specific API usage.
+ */
+struct ist http_parse_authority(struct http_uri_parser *parser, int no_userinfo)
+{
+ const char *ptr, *start, *end;
+
+ if (parser->state >= URI_PARSER_STATE_AUTHORITY_DONE)
+ goto not_found;
+
+ if (parser->format != URI_PARSER_FORMAT_ABSURI_OR_AUTHORITY)
+ goto not_found;
+
+ if (parser->state < URI_PARSER_STATE_SCHEME_DONE)
+ http_parse_scheme(parser);
+
+ ptr = start = istptr(parser->uri);
+ end = istend(parser->uri);
+
+ while (ptr < end && *ptr != '/') {
+ if (*ptr++ == '@' && no_userinfo)
+ start = ptr;
+ }
+
+ /* OK, ptr point on the '/' or the end */
+
+ authority:
+ parser->uri = ist2(ptr, end - ptr);
+ parser->state = URI_PARSER_STATE_AUTHORITY_DONE;
+ return ist2(start, ptr - start);
+
+ not_found:
+ parser->state = URI_PARSER_STATE_AUTHORITY_DONE;
+ return IST_NULL;
+}
+
+/* Parse the URI from the given transaction (which is assumed to be in request
+ * phase) and look for the "/" beginning the PATH. If not found, ist2(0,0) is
+ * returned. Otherwise the pointer and length are returned.
+ *
+ * <parser> must have been initialized via http_uri_parser_init. See the
+ * related http_uri_parser documentation for the specific API usage.
+ */
+struct ist http_parse_path(struct http_uri_parser *parser)
+{
+ const char *ptr, *end;
+
+ if (parser->state >= URI_PARSER_STATE_PATH_DONE)
+ goto not_found;
+
+ if (parser->format == URI_PARSER_FORMAT_EMPTY ||
+ parser->format == URI_PARSER_FORMAT_ASTERISK) {
+ goto not_found;
+ }
+
+ ptr = istptr(parser->uri);
+ end = istend(parser->uri);
+
+ /* If the uri is in absolute-path format, first skip the scheme and
+ * authority parts. No scheme will be found if the uri is in authority
+ * format, which indicates that the path won't be present.
+ */
+ if (parser->format == URI_PARSER_FORMAT_ABSURI_OR_AUTHORITY) {
+ if (parser->state < URI_PARSER_STATE_SCHEME_DONE) {
+ /* If no scheme found, uri is in authority format. No
+ * path is present.
+ */
+ if (!isttest(http_parse_scheme(parser)))
+ goto not_found;
+ }
+
+ if (parser->state < URI_PARSER_STATE_AUTHORITY_DONE)
+ http_parse_authority(parser, 1);
+
+ ptr = istptr(parser->uri);
+
+ if (ptr == end)
+ goto not_found;
+ }
+
+ parser->state = URI_PARSER_STATE_PATH_DONE;
+ return ist2(ptr, end - ptr);
+
+ not_found:
+ parser->state = URI_PARSER_STATE_PATH_DONE;
+ return IST_NULL;
+}
+
+/* Parse <value> Content-Length header field of an HTTP request. The function
+ * checks all possible occurrences of a comma-delimited value, and verifies if
+ * any of them doesn't match a previous value. <value> is sanitized on return
+ * to contain a single value if several identical values were found.
+ *
+ * <body_len> must be a valid pointer and is used to return the parsed length
+ * unless values differ. Also if <not_first> is true, <body_len> is assumed to
+ * point to previously parsed value and which must be equal to the new length.
+ * This is useful if an HTTP message contains several Content-Length headers.
+ *
+ * Returns <0 if a value differs, 0 if the whole header can be dropped (i.e.
+ * already known), or >0 if the value can be indexed (first one). In the last
+ * case, the value might be adjusted and the caller must only add the updated
+ * value.
+ */
+int http_parse_cont_len_header(struct ist *value, unsigned long long *body_len,
+ int not_first)
+{
+ char *e, *n;
+ unsigned long long cl;
+ struct ist word;
+ int check_prev = not_first;
+
+ word.ptr = value->ptr;
+ e = value->ptr + value->len;
+
+ while (1) {
+ if (word.ptr >= e) {
+ /* empty header or empty value */
+ goto fail;
+ }
+
+ /* skip leading delimiter and blanks */
+ if (unlikely(HTTP_IS_LWS(*word.ptr))) {
+ word.ptr++;
+ continue;
+ }
+
+ /* digits only now */
+ for (cl = 0, n = word.ptr; n < e; n++) {
+ unsigned int c = *n - '0';
+ if (unlikely(c > 9)) {
+ /* non-digit */
+ if (unlikely(n == word.ptr)) // spaces only
+ goto fail;
+ break;
+ }
+
+ if (unlikely(!cl && n > word.ptr)) {
+ /* There was a leading zero before this digit,
+ * let's trim it.
+ */
+ word.ptr = n;
+ }
+
+ if (unlikely(cl > ULLONG_MAX / 10ULL))
+ goto fail; /* multiply overflow */
+ cl = cl * 10ULL;
+ if (unlikely(cl + c < cl))
+ goto fail; /* addition overflow */
+ cl = cl + c;
+ }
+
+ /* keep a copy of the exact cleaned value */
+ word.len = n - word.ptr;
+
+ /* skip trailing LWS till next comma or EOL */
+ for (; n < e; n++) {
+ if (!HTTP_IS_LWS(*n)) {
+ if (unlikely(*n != ','))
+ goto fail;
+ break;
+ }
+ }
+
+ /* if duplicate, must be equal */
+ if (check_prev && cl != *body_len)
+ goto fail;
+
+ /* OK, store this result as the one to be indexed */
+ *body_len = cl;
+ *value = word;
+
+ /* Now either n==e and we're done, or n points to the comma,
+ * and we skip it and continue.
+ */
+ if (n++ == e)
+ break;
+
+ word.ptr = n;
+ check_prev = 1;
+ }
+
+ /* here we've reached the end with a single value or a series of
+ * identical values, all matching previous series if any. The last
+ * parsed value was sent back into <value>. We just have to decide
+ * if this occurrence has to be indexed (it's the first one) or
+ * silently skipped (it's not the first one)
+ */
+ return !not_first;
+ fail:
+ return -1;
+}
+
+/*
+ * Checks if <hdr> is exactly <name> for <len> chars, and ends with a colon.
+ * If so, returns the position of the first non-space character relative to
+ * <hdr>, or <end>-<hdr> if not found before. If no value is found, it tries
+ * to return a pointer to the place after the first space. Returns 0 if the
+ * header name does not match. Checks are case-insensitive.
+ */
+int http_header_match2(const char *hdr, const char *end,
+ const char *name, int len)
+{
+ const char *val;
+
+ if (hdr + len >= end)
+ return 0;
+ if (hdr[len] != ':')
+ return 0;
+ if (strncasecmp(hdr, name, len) != 0)
+ return 0;
+ val = hdr + len + 1;
+ while (val < end && HTTP_IS_SPHT(*val))
+ val++;
+ if ((val >= end) && (len + 2 <= end - hdr))
+ return len + 2; /* we may replace starting from second space */
+ return val - hdr;
+}
+
+/* Find the end of the header value contained between <s> and <e>. See RFC7230,
+ * par 3.2 for more information. Note that it requires a valid header to return
+ * a valid result. This works for headers defined as comma-separated lists.
+ */
+char *http_find_hdr_value_end(char *s, const char *e)
+{
+ int quoted, qdpair;
+
+ quoted = qdpair = 0;
+
+#ifdef HA_UNALIGNED_LE
+ /* speedup: skip everything not a comma nor a double quote */
+ for (; s <= e - sizeof(int); s += sizeof(int)) {
+ unsigned int c = *(int *)s; // comma
+ unsigned int q = c; // quote
+
+ c ^= 0x2c2c2c2c; // contains one zero on a comma
+ q ^= 0x22222222; // contains one zero on a quote
+
+ c = (c - 0x01010101) & ~c; // contains 0x80 below a comma
+ q = (q - 0x01010101) & ~q; // contains 0x80 below a quote
+
+ if ((c | q) & 0x80808080)
+ break; // found a comma or a quote
+ }
+#endif
+ for (; s < e; s++) {
+ if (qdpair) qdpair = 0;
+ else if (quoted) {
+ if (*s == '\\') qdpair = 1;
+ else if (*s == '"') quoted = 0;
+ }
+ else if (*s == '"') quoted = 1;
+ else if (*s == ',') return s;
+ }
+ return s;
+}
+
+/* Find the end of a cookie value contained between <s> and <e>. It works the
+ * same way as with headers above except that the semi-colon also ends a token.
+ * See RFC2965 for more information. Note that it requires a valid header to
+ * return a valid result.
+ */
+char *http_find_cookie_value_end(char *s, const char *e)
+{
+ int quoted, qdpair;
+
+ quoted = qdpair = 0;
+ for (; s < e; s++) {
+ if (qdpair) qdpair = 0;
+ else if (quoted) {
+ if (*s == '\\') qdpair = 1;
+ else if (*s == '"') quoted = 0;
+ }
+ else if (*s == '"') quoted = 1;
+ else if (*s == ',' || *s == ';') return s;
+ }
+ return s;
+}
+
+/* Try to find the next occurrence of a cookie name in a cookie header value.
+ * To match on any cookie name, <cookie_name_l> must be set to 0.
+ * The lookup begins at <hdr>. The pointer and size of the next occurrence of
+ * the cookie value is returned into *value and *value_l, and the function
+ * returns a pointer to the next pointer to search from if the value was found.
+ * Otherwise if the cookie was not found, NULL is returned and neither value
+ * nor value_l are touched. The input <hdr> string should first point to the
+ * header's value, and the <hdr_end> pointer must point to the first character
+ * not part of the value. <list> must be non-zero if value may represent a list
+ * of values (cookie headers). This makes it faster to abort parsing when no
+ * list is expected.
+ */
+char *http_extract_cookie_value(char *hdr, const char *hdr_end,
+ char *cookie_name, size_t cookie_name_l,
+ int list, char **value, size_t *value_l)
+{
+ char *equal, *att_end, *att_beg, *val_beg, *val_end;
+ char *next;
+
+ /* we search at least a cookie name followed by an equal, and more
+ * generally something like this :
+ * Cookie: NAME1 = VALUE 1 ; NAME2 = VALUE2 ; NAME3 = VALUE3\r\n
+ */
+ for (att_beg = hdr; att_beg + cookie_name_l + 1 < hdr_end; att_beg = next + 1) {
+ /* Iterate through all cookies on this line */
+
+ while (att_beg < hdr_end && HTTP_IS_SPHT(*att_beg))
+ att_beg++;
+
+ /* find att_end : this is the first character after the last non
+ * space before the equal. It may be equal to hdr_end.
+ */
+ equal = att_end = att_beg;
+
+ while (equal < hdr_end) {
+ if (*equal == '=' || *equal == ';' || (list && *equal == ','))
+ break;
+ if (HTTP_IS_SPHT(*equal++))
+ continue;
+ att_end = equal;
+ }
+
+ /* here, <equal> points to '=', a delimiter or the end. <att_end>
+ * is between <att_beg> and <equal>, both may be identical.
+ */
+
+ /* look for end of cookie if there is an equal sign */
+ if (equal < hdr_end && *equal == '=') {
+ /* look for the beginning of the value */
+ val_beg = equal + 1;
+ while (val_beg < hdr_end && HTTP_IS_SPHT(*val_beg))
+ val_beg++;
+
+ /* find the end of the value, respecting quotes */
+ next = http_find_cookie_value_end(val_beg, hdr_end);
+
+ /* make val_end point to the first white space or delimiter after the value */
+ val_end = next;
+ while (val_end > val_beg && HTTP_IS_SPHT(*(val_end - 1)))
+ val_end--;
+ } else {
+ val_beg = val_end = next = equal;
+ }
+
+ /* We have nothing to do with attributes beginning with '$'. However,
+ * they will automatically be removed if a header before them is removed,
+ * since they're supposed to be linked together.
+ */
+ if (*att_beg == '$')
+ continue;
+
+ /* Ignore cookies with no equal sign */
+ if (equal == next)
+ continue;
+
+ /* Now we have the cookie name between att_beg and att_end, and
+ * its value between val_beg and val_end.
+ */
+
+ if (cookie_name_l == 0 || (att_end - att_beg == cookie_name_l &&
+ memcmp(att_beg, cookie_name, cookie_name_l) == 0)) {
+ /* let's return this value and indicate where to go on from */
+ *value = val_beg;
+ *value_l = val_end - val_beg;
+ return next + 1;
+ }
+
+ /* Set-Cookie headers only have the name in the first attr=value part */
+ if (!list)
+ break;
+ }
+
+ return NULL;
+}
+
+/* Try to find the next cookie name in a cookie header given a pointer
+ * <hdr_beg> to the starting position, a pointer <hdr_end> to the ending
+ * position to search in the cookie and a boolean <is_req> of type int that
+ * indicates if the stream direction is for request or response.
+ * The lookup begins at <hdr_beg>, which is assumed to be in
+ * Cookie / Set-Cookie header, and the function returns a pointer to the next
+ * position to search from if a valid cookie k-v pair is found for Cookie
+ * request header (<is_req> is non-zero) and <hdr_end> for Set-Cookie response
+ * header (<is_req> is zero). When the next cookie name is found, <ptr> will
+ * be pointing to the start of the cookie name, and <len> will be the length
+ * of the cookie name.
+ * Otherwise if there is no valid cookie k-v pair, NULL is returned.
+ * The <hdr_end> pointer must point to the first character
+ * not part of the Cookie / Set-Cookie header.
+ */
+char *http_extract_next_cookie_name(char *hdr_beg, char *hdr_end, int is_req,
+ char **ptr, size_t *len)
+{
+ char *equal, *att_end, *att_beg, *val_beg;
+ char *next;
+
+ /* We search a valid cookie name between hdr_beg and hdr_end,
+ * followed by an equal. For example for the following cookie:
+ * Cookie: NAME1 = VALUE 1 ; NAME2 = VALUE2 ; NAME3 = VALUE3\r\n
+ * We want to find NAME1, NAME2, or NAME3 depending on where we start our search
+ * according to <hdr_beg>
+ */
+ for (att_beg = hdr_beg; att_beg + 1 < hdr_end; att_beg = next + 1) {
+ while (att_beg < hdr_end && HTTP_IS_SPHT(*att_beg))
+ att_beg++;
+
+ /* find <att_end> : this is the first character after the last non
+ * space before the equal. It may be equal to <hdr_end>.
+ */
+ equal = att_end = att_beg;
+
+ while (equal < hdr_end) {
+ if (*equal == '=' || *equal == ';')
+ break;
+ if (HTTP_IS_SPHT(*equal++))
+ continue;
+ att_end = equal;
+ }
+
+ /* Here, <equal> points to '=', a delimiter or the end. <att_end>
+ * is between <att_beg> and <equal>, both may be identical.
+ */
+
+ /* Look for end of cookie if there is an equal sign */
+ if (equal < hdr_end && *equal == '=') {
+ /* Look for the beginning of the value */
+ val_beg = equal + 1;
+ while (val_beg < hdr_end && HTTP_IS_SPHT(*val_beg))
+ val_beg++;
+
+ /* Find the end of the value, respecting quotes */
+ next = http_find_cookie_value_end(val_beg, hdr_end);
+ } else {
+ next = equal;
+ }
+
+ /* We have nothing to do with attributes beginning with '$'. However,
+ * they will automatically be removed if a header before them is removed,
+ * since they're supposed to be linked together.
+ */
+ if (*att_beg == '$')
+ continue;
+
+ /* Ignore cookies with no equal sign */
+ if (equal == next)
+ continue;
+
+ /* Now we have the cookie name between <att_beg> and <att_end>, and
+ * <next> points to the end of cookie value
+ */
+ *ptr = att_beg;
+ *len = att_end - att_beg;
+
+ /* Return next position for Cookie request header and <hdr_end> for
+ * Set-Cookie response header as each Set-Cookie header is assumed to
+ * contain only 1 cookie
+ */
+ if (is_req)
+ return next + 1;
+ return hdr_end;
+ }
+
+ return NULL;
+}
+
+/* Parses a qvalue and returns it multiplied by 1000, from 0 to 1000. If the
+ * value is larger than 1000, it is bound to 1000. The parser consumes up to
+ * 1 digit, one dot and 3 digits and stops on the first invalid character.
+ * Unparsable qvalues return 1000 as "q=1.000".
+ */
+int http_parse_qvalue(const char *qvalue, const char **end)
+{
+ int q = 1000;
+
+ if (!isdigit((unsigned char)*qvalue))
+ goto out;
+ q = (*qvalue++ - '0') * 1000;
+
+ if (*qvalue++ != '.')
+ goto out;
+
+ if (!isdigit((unsigned char)*qvalue))
+ goto out;
+ q += (*qvalue++ - '0') * 100;
+
+ if (!isdigit((unsigned char)*qvalue))
+ goto out;
+ q += (*qvalue++ - '0') * 10;
+
+ if (!isdigit((unsigned char)*qvalue))
+ goto out;
+ q += (*qvalue++ - '0') * 1;
+ out:
+ if (q > 1000)
+ q = 1000;
+ if (end)
+ *end = qvalue;
+ return q;
+}
+
+/*
+ * Given a url parameter, find the starting position of the first occurrence,
+ * or NULL if the parameter is not found.
+ *
+ * Example: if query_string is "yo=mama;ye=daddy" and url_param_name is "ye",
+ * the function will return query_string+8.
+ *
+ * Warning: this function returns a pointer that can point to the first chunk
+ * or the second chunk. The caller must be check the position before using the
+ * result.
+ */
+const char *http_find_url_param_pos(const char **chunks,
+ const char* url_param_name, size_t url_param_name_l,
+ char delim, char insensitive)
+{
+ const char *pos, *last, *equal;
+ const char **bufs = chunks;
+ int l1, l2;
+
+
+ pos = bufs[0];
+ last = bufs[1];
+ while (pos < last) {
+ /* Check the equal. */
+ equal = pos + url_param_name_l;
+ if (fix_pointer_if_wrap(chunks, &equal)) {
+ if (equal >= chunks[3])
+ return NULL;
+ } else {
+ if (equal >= chunks[1])
+ return NULL;
+ }
+ if (*equal == '=') {
+ if (pos + url_param_name_l > last) {
+ /* process wrap case, we detect a wrap. In this case, the
+ * comparison is performed in two parts.
+ */
+
+ /* This is the end, we don't have any other chunk. */
+ if (bufs != chunks || !bufs[2])
+ return NULL;
+
+ /* Compute the length of each part of the comparison. */
+ l1 = last - pos;
+ l2 = url_param_name_l - l1;
+
+ /* The second buffer is too short to contain the compared string. */
+ if (bufs[2] + l2 > bufs[3])
+ return NULL;
+
+ if (insensitive) {
+ if (strncasecmp(pos, url_param_name, l1) == 0 &&
+ strncasecmp(bufs[2], url_param_name+l1, l2) == 0)
+ return pos;
+ }
+ else {
+ if (memcmp(pos, url_param_name, l1) == 0 &&
+ memcmp(bufs[2], url_param_name+l1, l2) == 0)
+ return pos;
+ }
+
+ /* Perform wrapping and jump the string who fail the comparison. */
+ bufs += 2;
+ pos = bufs[0] + l2;
+ last = bufs[1];
+
+ } else {
+ /* process a simple comparison.*/
+ if (insensitive) {
+ if (strncasecmp(pos, url_param_name, url_param_name_l) == 0)
+ return pos;
+ } else {
+ if (memcmp(pos, url_param_name, url_param_name_l) == 0)
+ return pos;
+ }
+ pos += url_param_name_l + 1;
+ if (fix_pointer_if_wrap(chunks, &pos))
+ last = bufs[2];
+ }
+ }
+
+ while (1) {
+ /* Look for the next delimiter. */
+ while (pos < last && !http_is_param_delimiter(*pos, delim))
+ pos++;
+ if (pos < last)
+ break;
+ /* process buffer wrapping. */
+ if (bufs != chunks || !bufs[2])
+ return NULL;
+ bufs += 2;
+ pos = bufs[0];
+ last = bufs[1];
+ }
+ pos++;
+ }
+ return NULL;
+}
+
+/*
+ * Given a url parameter name and a query string, find the next value.
+ * An empty url_param_name matches the first available parameter.
+ * If the parameter is found, 1 is returned and *vstart / *vend are updated to
+ * respectively provide a pointer to the value and its end.
+ * Otherwise, 0 is returned and vstart/vend are not modified.
+ */
+int http_find_next_url_param(const char **chunks,
+ const char* url_param_name, size_t url_param_name_l,
+ const char **vstart, const char **vend, char delim, char insensitive)
+{
+ const char *arg_start, *qs_end;
+ const char *value_start, *value_end;
+
+ arg_start = chunks[0];
+ qs_end = chunks[1];
+ if (url_param_name_l) {
+ /* Looks for an argument name. */
+ arg_start = http_find_url_param_pos(chunks,
+ url_param_name, url_param_name_l,
+ delim, insensitive);
+ /* Check for wrapping. */
+ if (arg_start >= qs_end)
+ qs_end = chunks[3];
+ }
+ if (!arg_start)
+ return 0;
+
+ if (!url_param_name_l) {
+ while (1) {
+ /* looks for the first argument. */
+ value_start = memchr(arg_start, '=', qs_end - arg_start);
+ if (!value_start) {
+ /* Check for wrapping. */
+ if (arg_start >= chunks[0] &&
+ arg_start < chunks[1] &&
+ chunks[2]) {
+ arg_start = chunks[2];
+ qs_end = chunks[3];
+ continue;
+ }
+ return 0;
+ }
+ break;
+ }
+ value_start++;
+ }
+ else {
+ /* Jump the argument length. */
+ value_start = arg_start + url_param_name_l + 1;
+
+ /* Check for pointer wrapping. */
+ if (fix_pointer_if_wrap(chunks, &value_start)) {
+ /* Update the end pointer. */
+ qs_end = chunks[3];
+
+ /* Check for overflow. */
+ if (value_start >= qs_end)
+ return 0;
+ }
+ }
+
+ value_end = value_start;
+
+ while (1) {
+ while ((value_end < qs_end) && !http_is_param_delimiter(*value_end, delim))
+ value_end++;
+ if (value_end < qs_end)
+ break;
+ /* process buffer wrapping. */
+ if (value_end >= chunks[0] &&
+ value_end < chunks[1] &&
+ chunks[2]) {
+ value_end = chunks[2];
+ qs_end = chunks[3];
+ continue;
+ }
+ break;
+ }
+
+ *vstart = value_start;
+ *vend = value_end;
+ return 1;
+}
+
+/* Parses a single header line (without the CRLF) and splits it into its name
+ * and its value. The parsing is pretty naive and just skip spaces.
+ */
+int http_parse_header(const struct ist hdr, struct ist *name, struct ist *value)
+{
+ char *p = hdr.ptr;
+ char *end = p + hdr.len;
+
+ name->len = value->len = 0;
+
+ /* Skip leading spaces */
+ for (; p < end && HTTP_IS_SPHT(*p); p++);
+
+ /* Set the header name */
+ name->ptr = p;
+ for (; p < end && HTTP_IS_TOKEN(*p); p++);
+ name->len = p - name->ptr;
+
+ /* Skip the ':' and spaces before and after it */
+ for (; p < end && HTTP_IS_SPHT(*p); p++);
+ if (p < end && *p == ':') p++;
+ for (; p < end && HTTP_IS_SPHT(*p); p++);
+
+ /* Set the header value */
+ value->ptr = p;
+ value->len = end - p;
+
+ return 1;
+}
+
+/* Parses a single start line (without the CRLF) and splits it into 3 parts. The
+ * parsing is pretty naive and just skip spaces.
+ */
+int http_parse_stline(const struct ist line, struct ist *p1, struct ist *p2, struct ist *p3)
+{
+ char *p = line.ptr;
+ char *end = p + line.len;
+
+ p1->len = p2->len = p3->len = 0;
+
+ /* Skip leading spaces */
+ for (; p < end && HTTP_IS_SPHT(*p); p++);
+
+ /* Set the first part */
+ p1->ptr = p;
+ for (; p < end && HTTP_IS_TOKEN(*p); p++);
+ p1->len = p - p1->ptr;
+
+ /* Skip spaces between p1 and p2 */
+ for (; p < end && HTTP_IS_SPHT(*p); p++);
+
+ /* Set the second part */
+ p2->ptr = p;
+ for (; p < end && !HTTP_IS_SPHT(*p); p++);
+ p2->len = p - p2->ptr;
+
+ /* Skip spaces between p2 and p3 */
+ for (; p < end && HTTP_IS_SPHT(*p); p++);
+
+ /* The remaining is the third value */
+ p3->ptr = p;
+ p3->len = end - p;
+
+ return 1;
+}
+
+/* Parses value of a Status header with the following format: "Status: Code[
+ * Reason]". The parsing is pretty naive and just skip spaces. It return the
+ * numeric value of the status code.
+ */
+int http_parse_status_val(const struct ist value, struct ist *status, struct ist *reason)
+{
+ char *p = value.ptr;
+ char *end = p + value.len;
+ uint16_t code;
+
+ status->len = reason->len = 0;
+
+ /* Skip leading spaces */
+ for (; p < end && HTTP_IS_SPHT(*p); p++);
+
+ /* Set the status part */
+ status->ptr = p;
+ for (; p < end && HTTP_IS_TOKEN(*p); p++);
+ status->len = p - status->ptr;
+
+ /* Skip spaces between status and reason */
+ for (; p < end && HTTP_IS_SPHT(*p); p++);
+
+ /* the remaining is the reason */
+ reason->ptr = p;
+ reason->len = end - p;
+
+ code = strl2ui(status->ptr, status->len);
+ return code;
+}
+
+
+/* Returns non-zero if the two ETags are comparable (see RFC 7232#2.3.2).
+ * If any of them is a weak ETag, we discard the weakness prefix and perform
+ * a strict string comparison.
+ * Returns 0 otherwise.
+ */
+int http_compare_etags(struct ist etag1, struct ist etag2)
+{
+ enum http_etag_type etag_type1;
+ enum http_etag_type etag_type2;
+
+ etag_type1 = http_get_etag_type(etag1);
+ etag_type2 = http_get_etag_type(etag2);
+
+ if (etag_type1 == ETAG_INVALID || etag_type2 == ETAG_INVALID)
+ return 0;
+
+ /* Discard the 'W/' prefix an ETag is a weak one. */
+ if (etag_type1 == ETAG_WEAK)
+ etag1 = istadv(etag1, 2);
+ if (etag_type2 == ETAG_WEAK)
+ etag2 = istadv(etag2, 2);
+
+ return isteq(etag1, etag2);
+}
+
+
+/*
+ * Trim leading space or horizontal tab characters from <value> string.
+ * Returns the trimmed string.
+ */
+struct ist http_trim_leading_spht(struct ist value)
+{
+ struct ist ret = value;
+
+ while (ret.len && HTTP_IS_SPHT(ret.ptr[0])) {
+ ++ret.ptr;
+ --ret.len;
+ }
+
+ return ret;
+}
+
+/*
+ * Trim trailing space or horizontal tab characters from <value> string.
+ * Returns the trimmed string.
+ */
+struct ist http_trim_trailing_spht(struct ist value)
+{
+ struct ist ret = value;
+
+ while (ret.len && HTTP_IS_SPHT(ret.ptr[-1]))
+ --ret.len;
+
+ return ret;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-12 10:21:42 +0000