1 /* This file is part of the YAZ toolkit.
2 * Copyright (C) 1995-2012 Index Data
3 * See the file LICENSE for details.
7 * \brief Implements HTTP decoding
14 #include <yaz/yaz-version.h>
15 #include <yaz/yaz-iconv.h>
16 #include <yaz/matchstr.h>
18 #include <yaz/base64.h>
21 #define strncasecmp _strnicmp
22 #define strcasecmp _stricmp
25 static int decode_headers_content(ODR o, int off, Z_HTTP_Header **headers,
26 char **content_buf, int *content_len)
32 while (i < o->size-1 && o->buf[i] == '\n')
36 if (o->buf[i] == '\r' && i < o->size-1 && o->buf[i+1] == '\n')
41 if (o->buf[i] == '\n')
50 else if (o->buf[i] == ':')
53 *headers = (Z_HTTP_Header *) odr_malloc(o, sizeof(**headers));
54 (*headers)->name = (char*) odr_malloc(o, i - po + 1);
55 memcpy ((*headers)->name, o->buf + po, i - po);
56 (*headers)->name[i - po] = '\0';
58 while (i < o->size-1 && o->buf[i] == ' ')
60 for (po = i; i < o->size-1 && !strchr("\r\n", o->buf[i]); i++)
63 (*headers)->value = (char*) odr_malloc(o, i - po + 1);
64 memcpy ((*headers)->value, o->buf + po, i - po);
65 (*headers)->value[i - po] = '\0';
67 if (!strcasecmp((*headers)->name, "Transfer-Encoding")
69 !strcasecmp((*headers)->value, "chunked"))
71 headers = &(*headers)->next;
72 if (i < o->size-1 && o->buf[i] == '\r')
76 if (o->buf[i] != '\n')
87 /* we know buffer will be smaller than o->size - i*/
88 *content_buf = (char*) odr_malloc(o, o->size - i);
94 for (; i < o->size-2; i++)
95 if (yaz_isdigit(o->buf[i]))
96 chunk_len = chunk_len * 16 +
98 else if (yaz_isupper(o->buf[i]))
99 chunk_len = chunk_len * 16 +
100 (o->buf[i] - ('A'-10));
101 else if (yaz_islower(o->buf[i]))
102 chunk_len = chunk_len * 16 +
103 (o->buf[i] - ('a'-10));
106 /* chunk extension ... */
107 while (o->buf[i] != '\r' && o->buf[i+1] != '\n')
116 i += 2; /* skip CRLF */
119 if (chunk_len < 0 || off + chunk_len > o->size)
125 memcpy (*content_buf + off, o->buf + i, chunk_len);
126 i += chunk_len + 2; /* skip chunk+CRLF */
140 else if (i == o->size)
147 *content_len = o->size - i;
148 *content_buf = (char*) odr_malloc(o, *content_len + 1);
149 memcpy(*content_buf, o->buf + i, *content_len);
150 (*content_buf)[*content_len] = '\0';
156 void z_HTTP_header_add_content_type(ODR o, Z_HTTP_Header **hp,
157 const char *content_type,
160 const char *l = "Content-Type";
163 char *ctype = (char *)
164 odr_malloc(o, strlen(content_type)+strlen(charset) + 15);
165 sprintf(ctype, "%s; charset=%s", content_type, charset);
166 z_HTTP_header_add(o, hp, l, ctype);
169 z_HTTP_header_add(o, hp, l, content_type);
174 * HTTP Basic authentication is described at:
175 * http://tools.ietf.org/html/rfc1945#section-11.1
177 void z_HTTP_header_add_basic_auth(ODR o, Z_HTTP_Header **hp,
178 const char *username, const char *password)
188 len = strlen(username) + strlen(password);
189 tmp = (char *) odr_malloc(o, len+2);
190 sprintf(tmp, "%s:%s", username, password);
191 buf = (char *) odr_malloc(o, (len+1) * 8/6 + 12);
192 strcpy(buf, "Basic ");
193 yaz_base64encode(tmp, &buf[strlen(buf)]);
194 z_HTTP_header_add(o, hp, "Authorization", buf);
198 void z_HTTP_header_add(ODR o, Z_HTTP_Header **hp, const char *n,
203 *hp = (Z_HTTP_Header *) odr_malloc(o, sizeof(**hp));
204 (*hp)->name = odr_strdup(o, n);
205 (*hp)->value = odr_strdup(o, v);
209 const char *z_HTTP_header_lookup(const Z_HTTP_Header *hp, const char *n)
211 for (; hp; hp = hp->next)
212 if (!yaz_matchstr(hp->name, n))
218 Z_GDU *z_get_HTTP_Request(ODR o)
220 Z_GDU *p = (Z_GDU *) odr_malloc(o, sizeof(*p));
221 Z_HTTP_Request *hreq;
223 p->which = Z_GDU_HTTP_Request;
224 p->u.HTTP_Request = (Z_HTTP_Request *) odr_malloc(o, sizeof(*hreq));
225 hreq = p->u.HTTP_Request;
227 hreq->content_len = 0;
228 hreq->content_buf = 0;
229 hreq->version = "1.1";
230 hreq->method = "POST";
232 z_HTTP_header_add(o, &hreq->headers, "User-Agent", "YAZ/" YAZ_VERSION);
237 Z_GDU *z_get_HTTP_Request_host_path(ODR odr,
241 Z_GDU *p = z_get_HTTP_Request(odr);
243 p->u.HTTP_Request->path = odr_strdup(odr, path);
247 const char *cp0 = strstr(host, "://");
254 cp1 = strchr(cp0, '/');
256 cp1 = cp0+strlen(cp0);
260 char *h = (char*) odr_malloc(odr, cp1 - cp0 + 1);
261 memcpy (h, cp0, cp1 - cp0);
263 z_HTTP_header_add(odr, &p->u.HTTP_Request->headers,
270 Z_GDU *z_get_HTTP_Request_uri(ODR odr, const char *uri, const char *args,
273 Z_GDU *p = z_get_HTTP_Request(odr);
274 const char *cp0 = strstr(uri, "://");
281 cp1 = strchr(cp0, '/');
283 cp1 = cp0+strlen(cp0);
287 char *h = (char*) odr_malloc(odr, cp1 - cp0 + 1);
288 memcpy (h, cp0, cp1 - cp0);
290 z_HTTP_header_add(odr, &p->u.HTTP_Request->headers,
301 p->u.HTTP_Request->path = odr_malloc(odr, cp1 - uri + strlen(args) + 2);
304 memcpy(p->u.HTTP_Request->path, uri, cp1 - uri);
305 strcpy(p->u.HTTP_Request->path + (cp1 - uri), "/");
308 strcpy(p->u.HTTP_Request->path, "/");
309 strcat(p->u.HTTP_Request->path, args);
313 Z_GDU *z_get_HTTP_Response(ODR o, int code)
315 Z_GDU *p = (Z_GDU *) odr_malloc(o, sizeof(*p));
316 Z_HTTP_Response *hres;
318 p->which = Z_GDU_HTTP_Response;
319 p->u.HTTP_Response = (Z_HTTP_Response *) odr_malloc(o, sizeof(*hres));
320 hres = p->u.HTTP_Response;
322 hres->content_len = 0;
323 hres->content_buf = 0;
325 hres->version = "1.1";
326 z_HTTP_header_add(o, &hres->headers, "Server",
330 hres->content_buf = (char*) odr_malloc(o, 400);
331 sprintf(hres->content_buf,
332 "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01//EN\""
333 " \"http://www.w3.org/TR/html4/strict.dtd\">\n"
336 " <TITLE>YAZ " YAZ_VERSION "</TITLE>\n"
339 " <P><A HREF=\"http://www.indexdata.com/yaz/\">YAZ</A> "
341 " <P>Error: %d</P>\n"
342 " <P>Description: %.50s</P>\n"
345 code, z_HTTP_errmsg(code));
346 hres->content_len = strlen(hres->content_buf);
347 z_HTTP_header_add(o, &hres->headers, "Content-Type", "text/html");
352 const char *z_HTTP_errmsg(int code)
356 else if (code == 400)
357 return "Bad Request";
358 else if (code == 404)
360 else if (code == 405)
361 return "Method Not Allowed";
362 else if (code == 500)
363 return "Internal Error";
365 return "Unknown Error";
368 int yaz_decode_http_response(ODR o, Z_HTTP_Response **hr_p)
371 Z_HTTP_Response *hr = (Z_HTTP_Response *) odr_malloc(o, sizeof(*hr));
378 while (i < o->size-2 && !strchr(" \r\n", o->buf[i]))
380 hr->version = (char *) odr_malloc(o, i - po + 1);
382 memcpy(hr->version, o->buf + po, i - po);
383 hr->version[i-po] = 0;
384 if (o->buf[i] != ' ')
391 while (i < o->size-2 && o->buf[i] >= '0' && o->buf[i] <= '9')
393 hr->code = hr->code*10 + (o->buf[i] - '0');
396 while (i < o->size-1 && o->buf[i] != '\n')
398 return decode_headers_content(o, i, &hr->headers,
399 &hr->content_buf, &hr->content_len);
402 int yaz_decode_http_request(ODR o, Z_HTTP_Request **hr_p)
405 Z_HTTP_Request *hr = (Z_HTTP_Request *) odr_malloc(o, sizeof(*hr));
410 for (i = 0; o->buf[i] != ' '; i++)
411 if (i >= o->size-5 || i > 30)
416 hr->method = (char *) odr_malloc(o, i+1);
417 memcpy (hr->method, o->buf, i);
418 hr->method[i] = '\0';
421 for (i = po; o->buf[i] != ' '; i++)
427 hr->path = (char *) odr_malloc(o, i - po + 1);
428 memcpy (hr->path, o->buf+po, i - po);
429 hr->path[i - po] = '\0';
432 if (i > o->size-5 || memcmp(o->buf+i, "HTTP/", 5))
439 while (i < o->size && !strchr("\r\n", o->buf[i]))
441 hr->version = (char *) odr_malloc(o, i - po + 1);
442 memcpy(hr->version, o->buf + po, i - po);
443 hr->version[i - po] = '\0';
445 if (i < o->size-1 && o->buf[i] == '\r')
447 if (o->buf[i] != '\n')
452 return decode_headers_content(o, i, &hr->headers,
453 &hr->content_buf, &hr->content_len);
456 int yaz_encode_http_response(ODR o, Z_HTTP_Response *hr)
462 sprintf(sbuf, "HTTP/%s %d %s\r\n", hr->version,
464 z_HTTP_errmsg(hr->code));
465 odr_write(o, (unsigned char *) sbuf, strlen(sbuf));
466 /* apply Content-Length if not already applied */
467 if (!z_HTTP_header_lookup(hr->headers,
471 sprintf(lstr, "Content-Length: %d\r\n",
473 odr_write(o, (unsigned char *) lstr, strlen(lstr));
475 for (h = hr->headers; h; h = h->next)
477 odr_write(o, (unsigned char *) h->name, strlen(h->name));
478 odr_write(o, (unsigned char *) ": ", 2);
479 odr_write(o, (unsigned char *) h->value, strlen(h->value));
480 odr_write(o, (unsigned char *) "\r\n", 2);
482 odr_write(o, (unsigned char *) "\r\n", 2);
484 odr_write(o, (unsigned char *)
487 if (o->direction == ODR_PRINT)
489 odr_printf(o, "-- HTTP response:\n%.*s\n", o->top - top0,
491 odr_printf(o, "-- \n");
496 int yaz_encode_http_request(ODR o, Z_HTTP_Request *hr)
501 odr_write(o, (unsigned char *) hr->method,
503 odr_write(o, (unsigned char *) " ", 1);
504 odr_write(o, (unsigned char *) hr->path,
506 odr_write(o, (unsigned char *) " HTTP/", 6);
507 odr_write(o, (unsigned char *) hr->version,
508 strlen(hr->version));
509 odr_write(o, (unsigned char *) "\r\n", 2);
510 if (hr->content_len &&
511 !z_HTTP_header_lookup(hr->headers,
515 sprintf(lstr, "Content-Length: %d\r\n",
517 odr_write(o, (unsigned char *) lstr, strlen(lstr));
519 for (h = hr->headers; h; h = h->next)
521 odr_write(o, (unsigned char *) h->name, strlen(h->name));
522 odr_write(o, (unsigned char *) ": ", 2);
523 odr_write(o, (unsigned char *) h->value, strlen(h->value));
524 odr_write(o, (unsigned char *) "\r\n", 2);
526 odr_write(o, (unsigned char *) "\r\n", 2);
528 odr_write(o, (unsigned char *)
531 if (o->direction == ODR_PRINT)
533 odr_printf(o, "-- HTTP request:\n%.*s\n", o->top - top0,
535 odr_printf(o, "-- \n");
543 * c-file-style: "Stroustrup"
544 * indent-tabs-mode: nil
546 * vim: shiftwidth=4 tabstop=8 expandtab