trunk/Src/wptHTTP.cpp

/* wptHTTP.cpp - Generic HTTP support
 *      Copyright (C) 2004-2007, 2009 Timo Schulz
 *
 * This file is part of WinPT.
 *
 * WinPT 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.
 *  
 * WinPT is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <windows.h>
#include <ctype.h>
#include <errno.h>

#include "wptHTTP.h"
#include "wptTypes.h"
#include "wptErrors.h"
#include "StringBuffer.h"


/* Empty constructur to allow advanced requests. */
NetHTTP::NetHTTP (void)
{
    reset ();
}


/* Constructur to allow alternative syntax. */
NetHTTP::NetHTTP (const char *_host, int _port, const char *_url)
{
    reset ();
    this->host = strdup (_host);
    this->port = _port;
    this->url = strdup (_url);
    if (!sendRequest (_host, _port, _url))
        parseResponse (&statcode);

}


/* Standard constructur. */
NetHTTP::NetHTTP (const char *_url)
{
    reset ();
    open (_url);
}

/* Open a connection to the given URL @_url. */
int
NetHTTP::open (const char *_url)
{
    int err;

    /* A connection were privously established. */
    if (this->fd != 0)
        return 0;

    safe_free (this->host);
    safe_free (this->url);

    err = extractHostInfo (_url, &this->host, &this->url);
    if (err)
        return err;
    err = sendRequest (this->host, this->port, this->url);
    if (err)
        return err;
    return parseResponse (&statcode);
}


/* Reset object contents for first use. */
void
NetHTTP::reset (void)
{
    ver = 1;
    port = 80;
    host = url = NULL;
    req_headers = resp_headers = NULL;
    fd = statcode = 0;
    method = HTTP_GET;
    nleft = -1;
    error = 0;
}


/* Perform a HTTP 'HEAD' request. */
int
NetHTTP::head (const char *_url)
{
    int err;

    safe_free (host);
    safe_free (url);

    err = extractHostInfo (_url, &this->host, &this->url);
    if (err)
        return err;

    method = HTTP_HEAD;
    if (!sendRequest (host, port, url))
        err = parseResponse (&statcode);

    return err;
}


/* Perform a HTTP 'GET' request. */
int
NetHTTP::get (const char *_url)
{
    int err;

    safe_free (host);
    safe_free (url);

    err = extractHostInfo (_url, &this->host, &this->url);
    if (err)
        return err;

    method = HTTP_GET;
    if (!sendRequest (this->host, this->port, this->url))
        err = parseResponse (&statcode);

    return err;
}


/* Return HTTP status code. */
int 
NetHTTP::getStatusCode (void)
{
    return statcode;
}


/* Return MIME content type. */
const char*
NetHTTP::getContentType (void)
{
    const char *type = NULL;

    findHeader (resp_headers, "Content-Type", &type);
    return type;
}


/* Return content length. */
unsigned int
NetHTTP::getContentLength (void)
{
    const char *len = NULL;

    if (findHeader (resp_headers, "Content-Length", &len))
        return strtoul (len, NULL, 10);
    return 0;
}


void
NetHTTP::addHeader (http_head_t *root, const char *val)
{
    http_head_t n, t;
    
    t = (http_head_t)calloc (1, sizeof *t+strlen (val)+2);
    if (!t)
        BUG (0);
    strcpy (t->d, val);

    if (!*root)
        *root = t;
    else {
        for (n = *root; n->next; n=n->next)
            ;
        n->next = t;
    }
}


bool
NetHTTP::findHeader (http_head_t root, 
                     const char *name, const char **val)
{
    http_head_t n;
    char *p;
    
    *val = NULL;
    for (n = root; n; n = n->next) {
        if (strlen (n->d) >= strlen (name) && strstr (n->d, name)) {
            p = strchr (n->d, ':');
            *val = p? n->d + (p - n->d + 1 + 1) : NULL;
            return true;
        }
    }
    return false;
}


int
NetHTTP::connect (const char *_host, int _port)
{
    struct hostent *hp;
    struct sockaddr_in srv;
    unsigned long addr = 0;
    int i = 1;

    memset (&srv, 0, sizeof srv);
    srv.sin_port = htons ((unsigned short)_port);
    srv.sin_family = AF_INET;
    
    if (isalpha (*_host)) {
        hp = gethostbyname (_host);
        if (!hp) {
            this->error = (int)WSAGetLastError ();
            return WPTERR_WINSOCK_CONNECT;
        }
        memcpy (&srv.sin_addr, hp->h_addr, hp->h_length);
    }
    else {
        addr = inet_addr (_host);
        if (addr == INADDR_NONE) {
            this->error = (int)WSAGetLastError ();
            return WPTERR_WINSOCK_CONNECT;
        }
        memcpy (&srv.sin_addr, &addr, sizeof addr);
    }
            
    fd = socket (AF_INET, SOCK_STREAM, 0);
    if (fd < 0) {
        this->error = (int)WSAGetLastError ();
        return WPTERR_WINSOCK_SOCKET;
    }

    if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR, 
                    (const char*)&i, sizeof i)) {
        closesocket (fd);
        fd = 0;
        this->error = (int)WSAGetLastError ();
        return WPTERR_WINSOCK_SOCKET;
    }
    
    if (::connect (fd, (struct sockaddr *)&srv, sizeof (srv))) {
        closesocket (fd);
        fd = 0;
        this->error = (int)WSAGetLastError ();
        return WPTERR_WINSOCK_CONNECT;
    }

    return 0;
}


/* Return 0 if the next recv() call would be block. */
int
NetHTTP::isDataAvailable (int _fd)
{
    struct timeval tv;    
    fd_set inp;
    
    FD_ZERO (&inp);
    FD_SET (_fd, &inp);
    tv.tv_sec = 1;
    tv.tv_usec = 0;

    int n = select (_fd+1, &inp, NULL, NULL, &tv);
    if (n && FD_ISSET (_fd, &inp))
        return n;
    return 0;
}


/* Read a line from the open socket. A line means
   a sequence of octets terminated with a \r\n.
   Return value: 0 on success. */
int
NetHTTP::readLine (char *buf, unsigned int nbuf,
                   int nonblock, int *nn, int *eof)
{
    char c;
    int n, i;
    
    if (nn)
        *nn = 0;
    if (eof)
        *eof = 0;
    i = 0;
    do {
        if (nonblock == 1 && isDataAvailable (fd) == 0) {
            buf[i++] = '\0';
            i = -1;
            break;
        }
        n = recv (fd, &c, 1, 0);
        if (n == -1) {
            this->error = (int)WSAGetLastError ();
            break;
        }
        if (n == 0 || nbuf == 0 || c == '\n') {
            if (n == 0) {
                if (eof)
                    *eof = 1;
                buf[i++] = '\0';
            }
            else {
                buf[i++] = c;
                buf[i] = '\0';
            }
            break;
        }
        else {
            buf[i++] = c;
            nbuf--;
        }
    } while (n > 0 && i != -1);
    
    if (nn)
        *nn = i;
    return 0;
}


/* Extract the host from the given url @url. Return the host in
   @host and also return the resource part of the url in @new_url. */
int
NetHTTP::extractHostInfo (const char *_url, char **_host, char **new_url)
{   
    char tmpbuf[2*MAX_PATH+1];
    char *p;

    *_host = NULL;
    *new_url = NULL;

    /* XXX: do not use static buffers. */
    memset (tmpbuf, 0, sizeof (tmpbuf));
    strncpy (tmpbuf, _url, DIM (tmpbuf)-1);
    
    p = (char*)"http://";
    if (strlen (_url) < 10 || strncmp (_url, p, strlen (p)))
        return WPTERR_GENERAL;
    _url += strlen (p);
    p = strtok (tmpbuf+7, "/");
    if (!p)
        return WPTERR_GENERAL;
    *_host = strdup (p);   
    p = strchr (_url, '/');
    /* if no document were given so we assume the root '/'. */
    *new_url = !p? strdup ("/") : strdup (p);   

    return 0;
}


/* Add a request header. */
int 
NetHTTP::addRequestHeader (const char *name, const char *val)
{
    StringBuffer p;

    p = p + name + ": " + val;
    addHeader (&req_headers, p.getBuffer ());
    return 0;
}


void 
NetHTTP::setVersion (int _ver)
{
    if (_ver > 9)
        _ver = 0;
    this->ver = _ver;
}


int
NetHTTP::addRequestHeader (const char *name, unsigned int val)
{
    char buf[32];

    sprintf (buf, "%lu", (DWORD)val);
    return addRequestHeader (name, buf);
}


/* Prepare the request resource @url and send 
   it to host @host (port @port). */
int
NetHTTP::sendRequest (const char *_host, int _port, const char *_url)
{
    const char *id[] = {"GET", "HEAD", "PUT", "POST"};
    http_head_t h;
    StringBuffer out;
    int n;

    if (this->fd == 0) {
        int rc = connect (_host, _port);
        if (rc)
            return rc;
    }

    if (*_url == '/')
        _url++;
    if (_url == NULL)
        _url = "";

    addRequestHeader ("Host", _host);
    if (ver < 1)
        addRequestHeader ("Connection", "close");

    out = out + id[method] + " " + "/" + _url + " " + "HTTP/1." + (int)ver + "\r\n";
    for (h = req_headers; h; h = h->next)
        out = out + h->d + "\r\n";
    out = out + "\r\n";

    n = write (out.getBuffer (), strlen (out.getBuffer ()));
    //log_box ("debug", 0, "%d", n);
    return n > 0? 0 : WPTERR_GENERAL;
}


/* Parse all response resp_headers. */
int
NetHTTP::parseHeaders (http_head_t *r_head)
{
    char buf[300];
    int nn;
    int rc;
    
    if (!r_head)
        return WPTERR_GENERAL;

    do  {
        rc = readLine (buf, DIM (buf)-1, 1, &nn, NULL);
        if (rc)
            return rc;
        if (nn == 2)
            break; /* reach empty line */
        addHeader (r_head, buf);
    } while (rc == 0);
    return 0;
}


/* Default buffer size */
#define BUFSIZE 1024


/* Read data from the response and write it to @out. */
int
NetHTTP::readData (FILE *out)
{
    const char *val;
    char buf[BUFSIZE+1];
    int nlen, nn = 0, n, eof=0;
    int rc = 0;
    
    if (this->fd == 0 || this->resp_headers == NULL)
        return -1;

    nlen = getContentLength ();
    if (nlen == 0) {
        if (!findHeader (resp_headers, "Connection", &val) ||
            strnicmp (val, "close", 4))
            return WPTERR_GENERAL;
    }

    val = getContentType ();
    if (!val)
        return WPTERR_GENERAL;
    if (strnicmp (val, "text", 4)) { /* binary */
        do {
            n = recv (fd, buf, nlen > BUFSIZE? BUFSIZE : nlen, 0);
            if (n == -1) {
                this->error = (int)WSAGetLastError ();
                return SOCKET_ERROR;
            }
            if (n == 0)
                break;
            nlen -= n;
            fwrite (buf, 1, n, out);
        } while (nlen > 0);
        return 0;
    }

    do {
        rc = readLine (buf, DIM (buf)-1, 1, &n, &eof);
        if (rc)
            return rc;
        if (n > 0)
            fwrite (buf, 1, n, out);
        if (nlen > 0) {
            nn += n;
            if (nlen == nn)
                break;
        }
    } while (eof == 0);

    return 0;
}


/* Parse the HTTP response line. */
int
NetHTTP::parseResponse (int *_statcode)
{
    http_head_t n;
    const char *tmp, *p;
    char buf[300];
    int code = 0, nn = 0;
    int rc;

    *_statcode = 0;
    rc = readLine (buf, DIM (buf)-1, 1, &nn, NULL);
    if (rc)
        return rc;

    tmp = "HTTP/1.";
    if (strlen (buf) < 8 || strncmp (buf, tmp, strlen (tmp)))
        return WPTERR_GENERAL;
    p = buf;
    p += strlen (tmp)+1 + 1; /* skip HTTP/1.x and WS */
    *_statcode = atoi (p);
    if (tmp == 0)
        return WPTERR_GENERAL;
    p += 3 + 1; /* number + WS */

    if (code == HTTP_STAT_400 ||            
        code == HTTP_STAT_403 ||
        code == HTTP_STAT_404 ||
        code == HTTP_STAT_405)
        return WPTERR_GENERAL;

    while (resp_headers) {
        n = resp_headers->next;
        free (resp_headers);
        resp_headers = n;
    }
    resp_headers = NULL;
    rc = parseHeaders (&resp_headers);
    if (rc)
        return rc;
    return 0;
}


/* Destroy HTTP object. */
NetHTTP::~NetHTTP (void)
{
    http_head_t h;
    
    while (resp_headers) {
        h = resp_headers->next;
        free (resp_headers);
        resp_headers = h;
    }
    while (req_headers) {
        h = req_headers->next;
        free (req_headers);
        req_headers = h;
    }
    safe_free (url);
    safe_free (host);
    if (fd != 0) {
        closesocket (fd);
        fd = 0;
    }
}


/* Read @buflen bytes from the http stream into the buffer @buf. */
int
NetHTTP::read (void *buf, unsigned int buflen)
{
    int n;

    if (this->fd == 0 || this->resp_headers == NULL)
        return -1;
    if (method != HTTP_GET)
        return -1;

    if (nleft == -1)
        nleft = getContentLength ();
    if ((int)buflen > nleft)
        buflen = nleft;
    if (nleft == 0)
        return -1;

    n = recv (fd, (char*)buf, (int)buflen, 0);
    if (n > 0) {
        nleft -= n;
        if (nleft < 0) 
            nleft = 0;
    }
    return n;
}


/* Write the buffer @buf to the http stream.
   The function should be considered general as a replacement
   for send() to make sure the entire buffer is written. */
int
NetHTTP::write (const void *buf, unsigned int buflen)
{
    const char *buffer = (const char*)buf;
    unsigned int bytesleft = buflen;
    int nwritten;

    if (this->fd == 0)
        return -1;

    while (bytesleft > 0) {
        nwritten = send (this->fd, buffer, bytesleft, 0);
        if (nwritten == -1)
            return -1;
        bytesleft -= nwritten;
        buffer += nwritten;
    }
    return buflen;
}


/* Return the Winsock specific error code. */
int NetHTTP::getErrorCode (void)
{
    return error;
}
1	/* wptHTTP.cpp - Generic HTTP support
2	* Copyright (C) 2004-2007, 2009 Timo Schulz
3	*
4	* This file is part of WinPT.
5	*
6	* WinPT is free software; you can redistribute it and/or
7	* modify it under the terms of the GNU General Public License
8	* as published by the Free Software Foundation; either version 2
9	* of the License, or (at your option) any later version.
10	*
11	* WinPT is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14	* General Public License for more details.
15	*/
16	#ifdef HAVE_CONFIG_H
17	#include <config.h>
18	#endif
19
20	#include <stdio.h>
21	#include <stdio.h>
22	#include <stdlib.h>
23	#include <string.h>
24	#include <windows.h>
25	#include <ctype.h>
26	#include <errno.h>
27
28	#include "wptHTTP.h"
29	#include "wptTypes.h"
30	#include "wptErrors.h"
31	#include "StringBuffer.h"
32
33
34	/* Empty constructur to allow advanced requests. */
35	NetHTTP::NetHTTP (void)
36	{
37	reset ();
38	}
39
40
41	/* Constructur to allow alternative syntax. */
42	NetHTTP::NetHTTP (const char _host, int _port, const char _url)
43	{
44	reset ();
45	this->host = strdup (_host);
46	this->port = _port;
47	this->url = strdup (_url);
48	if (!sendRequest (_host, _port, _url))
49	parseResponse (&statcode);
50
51	}
52
53
54	/* Standard constructur. */
55	NetHTTP::NetHTTP (const char *_url)
56	{
57	reset ();
58	open (_url);
59	}
60
61	/* Open a connection to the given URL @_url. */
62	int
63	NetHTTP::open (const char *_url)
64	{
65	int err;
66
67	/* A connection were privously established. */
68	if (this->fd != 0)
69	return 0;
70
71	safe_free (this->host);
72	safe_free (this->url);
73
74	err = extractHostInfo (_url, &this->host, &this->url);
75	if (err)
76	return err;
77	err = sendRequest (this->host, this->port, this->url);
78	if (err)
79	return err;
80	return parseResponse (&statcode);
81	}
82
83
84	/* Reset object contents for first use. */
85	void
86	NetHTTP::reset (void)
87	{
88	ver = 1;
89	port = 80;
90	host = url = NULL;
91	req_headers = resp_headers = NULL;
92	fd = statcode = 0;
93	method = HTTP_GET;
94	nleft = -1;
95	error = 0;
96	}
97
98
99	/* Perform a HTTP 'HEAD' request. */
100	int
101	NetHTTP::head (const char *_url)
102	{
103	int err;
104
105	safe_free (host);
106	safe_free (url);
107
108	err = extractHostInfo (_url, &this->host, &this->url);
109	if (err)
110	return err;
111
112	method = HTTP_HEAD;
113	if (!sendRequest (host, port, url))
114	err = parseResponse (&statcode);
115
116	return err;
117	}
118
119
120	/* Perform a HTTP 'GET' request. */
121	int
122	NetHTTP::get (const char *_url)
123	{
124	int err;
125
126	safe_free (host);
127	safe_free (url);
128
129	err = extractHostInfo (_url, &this->host, &this->url);
130	if (err)
131	return err;
132
133	method = HTTP_GET;
134	if (!sendRequest (this->host, this->port, this->url))
135	err = parseResponse (&statcode);
136
137	return err;
138	}
139
140
141	/* Return HTTP status code. */
142	int
143	NetHTTP::getStatusCode (void)
144	{
145	return statcode;
146	}
147
148
149	/* Return MIME content type. */
150	const char*
151	NetHTTP::getContentType (void)
152	{
153	const char *type = NULL;
154
155	findHeader (resp_headers, "Content-Type", &type);
156	return type;
157	}
158
159
160	/* Return content length. */
161	unsigned int
162	NetHTTP::getContentLength (void)
163	{
164	const char *len = NULL;
165
166	if (findHeader (resp_headers, "Content-Length", &len))
167	return strtoul (len, NULL, 10);
168	return 0;
169	}
170
171
172	void
173	NetHTTP::addHeader (http_head_t root, const char val)
174	{
175	http_head_t n, t;
176
177	t = (http_head_t)calloc (1, sizeof *t+strlen (val)+2);
178	if (!t)
179	BUG (0);
180	strcpy (t->d, val);
181
182	if (!*root)
183	*root = t;
184	else {
185	for (n = *root; n->next; n=n->next)
186	;
187	n->next = t;
188	}
189	}
190
191
192	bool
193	NetHTTP::findHeader (http_head_t root,
194	const char name, const char *val)
195	{
196	http_head_t n;
197	char *p;
198
199	*val = NULL;
200	for (n = root; n; n = n->next) {
201	if (strlen (n->d) >= strlen (name) && strstr (n->d, name)) {
202	p = strchr (n->d, ':');
203	*val = p? n->d + (p - n->d + 1 + 1) : NULL;
204	return true;
205	}
206	}
207	return false;
208	}
209
210
211	int
212	NetHTTP::connect (const char *_host, int _port)
213	{
214	struct hostent *hp;
215	struct sockaddr_in srv;
216	unsigned long addr = 0;
217	int i = 1;
218
219	memset (&srv, 0, sizeof srv);
220	srv.sin_port = htons ((unsigned short)_port);
221	srv.sin_family = AF_INET;
222
223	if (isalpha (*_host)) {
224	hp = gethostbyname (_host);
225	if (!hp) {
226	this->error = (int)WSAGetLastError ();
227	return WPTERR_WINSOCK_CONNECT;
228	}
229	memcpy (&srv.sin_addr, hp->h_addr, hp->h_length);
230	}
231	else {
232	addr = inet_addr (_host);
233	if (addr == INADDR_NONE) {
234	this->error = (int)WSAGetLastError ();
235	return WPTERR_WINSOCK_CONNECT;
236	}
237	memcpy (&srv.sin_addr, &addr, sizeof addr);
238	}
239
240	fd = socket (AF_INET, SOCK_STREAM, 0);
241	if (fd < 0) {
242	this->error = (int)WSAGetLastError ();
243	return WPTERR_WINSOCK_SOCKET;
244	}
245
246	if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
247	(const char*)&i, sizeof i)) {
248	closesocket (fd);
249	fd = 0;
250	this->error = (int)WSAGetLastError ();
251	return WPTERR_WINSOCK_SOCKET;
252	}
253
254	if (::connect (fd, (struct sockaddr *)&srv, sizeof (srv))) {
255	closesocket (fd);
256	fd = 0;
257	this->error = (int)WSAGetLastError ();
258	return WPTERR_WINSOCK_CONNECT;
259	}
260
261	return 0;
262	}
263
264
265	/* Return 0 if the next recv() call would be block. */
266	int
267	NetHTTP::isDataAvailable (int _fd)
268	{
269	struct timeval tv;
270	fd_set inp;
271
272	FD_ZERO (&inp);
273	FD_SET (_fd, &inp);
274	tv.tv_sec = 1;
275	tv.tv_usec = 0;
276
277	int n = select (_fd+1, &inp, NULL, NULL, &tv);
278	if (n && FD_ISSET (_fd, &inp))
279	return n;
280	return 0;
281	}
282
283
284	/* Read a line from the open socket. A line means
285	a sequence of octets terminated with a \r\n.
286	Return value: 0 on success. */
287	int
288	NetHTTP::readLine (char *buf, unsigned int nbuf,
289	int nonblock, int nn, int eof)
290	{
291	char c;
292	int n, i;
293
294	if (nn)
295	*nn = 0;
296	if (eof)
297	*eof = 0;
298	i = 0;
299	do {
300	if (nonblock == 1 && isDataAvailable (fd) == 0) {
301	buf[i++] = '\0';
302	i = -1;
303	break;
304	}
305	n = recv (fd, &c, 1, 0);
306	if (n == -1) {
307	this->error = (int)WSAGetLastError ();
308	break;
309	}
310	if (n == 0 \|\| nbuf == 0 \|\| c == '\n') {
311	if (n == 0) {
312	if (eof)
313	*eof = 1;
314	buf[i++] = '\0';
315	}
316	else {
317	buf[i++] = c;
318	buf[i] = '\0';
319	}
320	break;
321	}
322	else {
323	buf[i++] = c;
324	nbuf--;
325	}
326	} while (n > 0 && i != -1);
327
328	if (nn)
329	*nn = i;
330	return 0;
331	}
332
333
334
335	/* Extract the host from the given url @url. Return the host in
336	@host and also return the resource part of the url in @new_url. */
337	int
338	NetHTTP::extractHostInfo (const char _url, char _host, char *new_url)
339	{
340	char tmpbuf[2*MAX_PATH+1];
341	char *p;
342
343	*_host = NULL;
344	*new_url = NULL;
345
346	/* XXX: do not use static buffers. */
347	memset (tmpbuf, 0, sizeof (tmpbuf));
348	strncpy (tmpbuf, _url, DIM (tmpbuf)-1);
349
350	p = (char*)"http://";
351	if (strlen (_url) < 10 \|\| strncmp (_url, p, strlen (p)))
352	return WPTERR_GENERAL;
353	_url += strlen (p);
354	p = strtok (tmpbuf+7, "/");
355	if (!p)
356	return WPTERR_GENERAL;
357	*_host = strdup (p);
358	p = strchr (_url, '/');
359	/* if no document were given so we assume the root '/'. */
360	*new_url = !p? strdup ("/") : strdup (p);
361
362	return 0;
363	}
364
365
366	/* Add a request header. */
367	int
368	NetHTTP::addRequestHeader (const char name, const char val)
369	{
370	StringBuffer p;
371
372	p = p + name + ": " + val;
373	addHeader (&req_headers, p.getBuffer ());
374	return 0;
375	}
376
377
378	void
379	NetHTTP::setVersion (int _ver)
380	{
381	if (_ver > 9)
382	_ver = 0;
383	this->ver = _ver;
384	}
385
386
387	int
388	NetHTTP::addRequestHeader (const char *name, unsigned int val)
389	{
390	char buf[32];
391
392	sprintf (buf, "%lu", (DWORD)val);
393	return addRequestHeader (name, buf);
394	}
395
396
397	/* Prepare the request resource @url and send
398	it to host @host (port @port). */
399	int
400	NetHTTP::sendRequest (const char _host, int _port, const char _url)
401	{
402	const char *id[] = {"GET", "HEAD", "PUT", "POST"};
403	http_head_t h;
404	StringBuffer out;
405	int n;
406
407	if (this->fd == 0) {
408	int rc = connect (_host, _port);
409	if (rc)
410	return rc;
411	}
412
413	if (*_url == '/')
414	_url++;
415	if (_url == NULL)
416	_url = "";
417
418	addRequestHeader ("Host", _host);
419	if (ver < 1)
420	addRequestHeader ("Connection", "close");
421
422	out = out + id[method] + " " + "/" + _url + " " + "HTTP/1." + (int)ver + "\r\n";
423	for (h = req_headers; h; h = h->next)
424	out = out + h->d + "\r\n";
425	out = out + "\r\n";
426
427	n = write (out.getBuffer (), strlen (out.getBuffer ()));
428	//log_box ("debug", 0, "%d", n);
429	return n > 0? 0 : WPTERR_GENERAL;
430	}
431
432
433	/* Parse all response resp_headers. */
434	int
435	NetHTTP::parseHeaders (http_head_t *r_head)
436	{
437	char buf[300];
438	int nn;
439	int rc;
440
441	if (!r_head)
442	return WPTERR_GENERAL;
443
444	do {
445	rc = readLine (buf, DIM (buf)-1, 1, &nn, NULL);
446	if (rc)
447	return rc;
448	if (nn == 2)
449	break; /* reach empty line */
450	addHeader (r_head, buf);
451	} while (rc == 0);
452	return 0;
453	}
454
455
456	/* Default buffer size */
457	#define BUFSIZE 1024
458
459
460	/* Read data from the response and write it to @out. */
461	int
462	NetHTTP::readData (FILE *out)
463	{
464	const char *val;
465	char buf[BUFSIZE+1];
466	int nlen, nn = 0, n, eof=0;
467	int rc = 0;
468
469	if (this->fd == 0 \|\| this->resp_headers == NULL)
470	return -1;
471
472	nlen = getContentLength ();
473	if (nlen == 0) {
474	if (!findHeader (resp_headers, "Connection", &val) \|\|
475	strnicmp (val, "close", 4))
476	return WPTERR_GENERAL;
477	}
478
479	val = getContentType ();
480	if (!val)
481	return WPTERR_GENERAL;
482	if (strnicmp (val, "text", 4)) { /* binary */
483	do {
484	n = recv (fd, buf, nlen > BUFSIZE? BUFSIZE : nlen, 0);
485	if (n == -1) {
486	this->error = (int)WSAGetLastError ();
487	return SOCKET_ERROR;
488	}
489	if (n == 0)
490	break;
491	nlen -= n;
492	fwrite (buf, 1, n, out);
493	} while (nlen > 0);
494	return 0;
495	}
496
497	do {
498	rc = readLine (buf, DIM (buf)-1, 1, &n, &eof);
499	if (rc)
500	return rc;
501	if (n > 0)
502	fwrite (buf, 1, n, out);
503	if (nlen > 0) {
504	nn += n;
505	if (nlen == nn)
506	break;
507	}
508	} while (eof == 0);
509
510	return 0;
511	}
512
513
514	/* Parse the HTTP response line. */
515	int
516	NetHTTP::parseResponse (int *_statcode)
517	{
518	http_head_t n;
519	const char tmp, p;
520	char buf[300];
521	int code = 0, nn = 0;
522	int rc;
523
524	*_statcode = 0;
525	rc = readLine (buf, DIM (buf)-1, 1, &nn, NULL);
526	if (rc)
527	return rc;
528
529	tmp = "HTTP/1.";
530	if (strlen (buf) < 8 \|\| strncmp (buf, tmp, strlen (tmp)))
531	return WPTERR_GENERAL;
532	p = buf;
533	p += strlen (tmp)+1 + 1; /* skip HTTP/1.x and WS */
534	*_statcode = atoi (p);
535	if (tmp == 0)
536	return WPTERR_GENERAL;
537	p += 3 + 1; /* number + WS */
538
539	if (code == HTTP_STAT_400 \|\|
540	code == HTTP_STAT_403 \|\|
541	code == HTTP_STAT_404 \|\|
542	code == HTTP_STAT_405)
543	return WPTERR_GENERAL;
544
545	while (resp_headers) {
546	n = resp_headers->next;
547	free (resp_headers);
548	resp_headers = n;
549	}
550	resp_headers = NULL;
551	rc = parseHeaders (&resp_headers);
552	if (rc)
553	return rc;
554	return 0;
555	}
556
557
558	/* Destroy HTTP object. */
559	NetHTTP::~NetHTTP (void)
560	{
561	http_head_t h;
562
563	while (resp_headers) {
564	h = resp_headers->next;
565	free (resp_headers);
566	resp_headers = h;
567	}
568	while (req_headers) {
569	h = req_headers->next;
570	free (req_headers);
571	req_headers = h;
572	}
573	safe_free (url);
574	safe_free (host);
575	if (fd != 0) {
576	closesocket (fd);
577	fd = 0;
578	}
579	}
580
581
582	/* Read @buflen bytes from the http stream into the buffer @buf. */
583	int
584	NetHTTP::read (void *buf, unsigned int buflen)
585	{
586	int n;
587
588	if (this->fd == 0 \|\| this->resp_headers == NULL)
589	return -1;
590	if (method != HTTP_GET)
591	return -1;
592
593	if (nleft == -1)
594	nleft = getContentLength ();
595	if ((int)buflen > nleft)
596	buflen = nleft;
597	if (nleft == 0)
598	return -1;
599
600	n = recv (fd, (char*)buf, (int)buflen, 0);
601	if (n > 0) {
602	nleft -= n;
603	if (nleft < 0)
604	nleft = 0;
605	}
606	return n;
607	}
608
609
610	/* Write the buffer @buf to the http stream.
611	The function should be considered general as a replacement
612	for send() to make sure the entire buffer is written. */
613	int
614	NetHTTP::write (const void *buf, unsigned int buflen)
615	{
616	const char buffer = (const char)buf;
617	unsigned int bytesleft = buflen;
618	int nwritten;
619
620	if (this->fd == 0)
621	return -1;
622
623	while (bytesleft > 0) {
624	nwritten = send (this->fd, buffer, bytesleft, 0);
625	if (nwritten == -1)
626	return -1;
627	bytesleft -= nwritten;
628	buffer += nwritten;
629	}
630	return buflen;
631	}
632
633
634	/* Return the Winsock specific error code. */
635	int NetHTTP::getErrorCode (void)
636	{
637	return error;
638	}