trunk/Src/wptHTTP.cpp

/* wptHTTP.cpp - Generic HTTP support
 *      Copyright (C) 2004-2007 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;
    int n;

    FD_ZERO (&inp);
    FD_SET (_fd, &inp);
    tv.tv_sec = 1;
    tv.tv_usec = 0;

    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 = "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	twoaday	181	/* wptHTTP.cpp - Generic HTTP support
2	twoaday	314	* Copyright (C) 2004-2007 Timo Schulz
3	twoaday	181	*
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	twoaday	314	#include "StringBuffer.h"
32	twoaday	181
33
34			/* Empty constructur to allow advanced requests. */
35	twoaday	314	NetHTTP::NetHTTP (void)
36	twoaday	181	{
37			reset ();
38			}
39
40
41			/* Constructur to allow alternative syntax. */
42	twoaday	314	NetHTTP::NetHTTP (const char _host, int _port, const char _url)
43	twoaday	181	{
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	twoaday	314	NetHTTP::NetHTTP (const char *_url)
56	twoaday	181	{
57			reset ();
58	twoaday	308	open (_url);
59			}
60	twoaday	262
61	twoaday	314	/* Open a connection to the given URL @_url. */
62	twoaday	308	int
63	twoaday	314	NetHTTP::open (const char *_url)
64	twoaday	308	{
65	twoaday	314	int err;
66
67			/* A connection were privously established. */
68			if (this->fd != 0)
69			return 0;
70
71	twoaday	310	safe_free (this->host);
72			safe_free (this->url);
73	twoaday	314
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	twoaday	181	}
82
83
84			/* Reset object contents for first use. */
85			void
86	twoaday	314	NetHTTP::reset (void)
87	twoaday	181	{
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	twoaday	200	error = 0;
96	twoaday	181	}
97
98
99			/* Perform a HTTP 'HEAD' request. */
100			int
101	twoaday	314	NetHTTP::head (const char *_url)
102	twoaday	181	{
103	twoaday	262	int err;
104
105	twoaday	260	safe_free (host);
106			safe_free (url);
107	twoaday	181
108	twoaday	262	err = extractHostInfo (_url, &this->host, &this->url);
109			if (err)
110			return err;
111	twoaday	314
112	twoaday	181	method = HTTP_HEAD;
113	twoaday	314	if (!sendRequest (host, port, url))
114			err = parseResponse (&statcode);
115	twoaday	181
116	twoaday	314	return err;
117	twoaday	181	}
118
119
120			/* Perform a HTTP 'GET' request. */
121			int
122	twoaday	314	NetHTTP::get (const char *_url)
123	twoaday	181	{
124	twoaday	262	int err;
125
126	twoaday	314	safe_free (host);
127			safe_free (url);
128	twoaday	181
129	twoaday	262	err = extractHostInfo (_url, &this->host, &this->url);
130			if (err)
131			return err;
132	twoaday	181
133			method = HTTP_GET;
134			if (!sendRequest (this->host, this->port, this->url))
135	twoaday	314	err = parseResponse (&statcode);
136	twoaday	181
137	twoaday	314	return err;
138	twoaday	181	}
139
140
141			/* Return HTTP status code. */
142			int
143	twoaday	314	NetHTTP::getStatusCode (void)
144	twoaday	181	{
145			return statcode;
146			}
147
148
149			/* Return MIME content type. */
150			const char*
151	twoaday	314	NetHTTP::getContentType (void)
152	twoaday	181	{
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	twoaday	314	NetHTTP::getContentLength (void)
163	twoaday	181	{
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	twoaday	314	NetHTTP::addHeader (http_head_t root, const char val)
174	twoaday	181	{
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	twoaday	314	NetHTTP::findHeader (http_head_t root,
194			const char name, const char *val)
195	twoaday	181	{
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) &&
202			strstr (n->d, name)) {
203			p = strchr (n->d, ':');
204			*val = p? n->d + (p - n->d + 1 + 1) : NULL;
205			return true;
206			}
207			}
208			return false;
209			}
210
211
212			int
213	twoaday	314	NetHTTP::connect (const char *_host, int _port)
214	twoaday	181	{
215			struct hostent *hp;
216			struct sockaddr_in srv;
217			unsigned long addr = 0;
218			int i = 1;
219
220			memset (&srv, 0, sizeof srv);
221			srv.sin_port = htons ((unsigned short)_port);
222			srv.sin_family = AF_INET;
223
224			if (isalpha (*_host)) {
225			hp = gethostbyname (_host);
226	twoaday	200	if (!hp) {
227			this->error = (int)WSAGetLastError ();
228	twoaday	181	return WPTERR_WINSOCK_CONNECT;
229	twoaday	200	}
230	twoaday	181	memcpy (&srv.sin_addr, hp->h_addr, hp->h_length);
231			}
232			else {
233			addr = inet_addr (_host);
234	twoaday	200	if (addr == INADDR_NONE) {
235			this->error = (int)WSAGetLastError ();
236	twoaday	181	return WPTERR_WINSOCK_CONNECT;
237	twoaday	200	}
238	twoaday	181	memcpy (&srv.sin_addr, &addr, sizeof addr);
239			}
240
241			fd = socket (AF_INET, SOCK_STREAM, 0);
242	twoaday	200	if (fd < 0) {
243			this->error = (int)WSAGetLastError ();
244	twoaday	181	return WPTERR_WINSOCK_SOCKET;
245	twoaday	200	}
246	twoaday	181
247			if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
248			(const char*)&i, sizeof i)) {
249			closesocket (fd);
250			fd = 0;
251	twoaday	200	this->error = (int)WSAGetLastError ();
252	twoaday	181	return WPTERR_WINSOCK_SOCKET;
253			}
254
255	twoaday	314	if (::connect (fd, (struct sockaddr *)&srv, sizeof (srv))) {
256	twoaday	181	closesocket (fd);
257			fd = 0;
258	twoaday	200	this->error = (int)WSAGetLastError ();
259	twoaday	181	return WPTERR_WINSOCK_CONNECT;
260			}
261
262			return 0;
263			}
264
265
266	twoaday	314	/* Return 0 if the next recv() call would be block. */
267	twoaday	181	int
268	twoaday	314	NetHTTP::isDataAvailable (int _fd)
269	twoaday	181	{
270			struct timeval tv;
271			fd_set inp;
272			int n;
273
274			FD_ZERO (&inp);
275			FD_SET (_fd, &inp);
276			tv.tv_sec = 1;
277			tv.tv_usec = 0;
278
279			n = select (_fd+1, &inp, NULL, NULL, &tv);
280			if (n && FD_ISSET (_fd, &inp))
281			return n;
282			return 0;
283			}
284
285
286	twoaday	314	/* Read a line from the open socket. A line means
287			a sequence of octets terminated with a \r\n.
288			Return value: 0 on success. */
289	twoaday	181	int
290	twoaday	314	NetHTTP::readLine (char *buf, unsigned int nbuf,
291	twoaday	181	int nonblock, int nn, int eof)
292			{
293			char c;
294			int n, i;
295
296			if (nn)
297			*nn = 0;
298			if (eof)
299			*eof = 0;
300			i = 0;
301			do {
302			if (nonblock == 1 && isDataAvailable (fd) == 0) {
303			buf[i++] = '\0';
304			i = -1;
305			break;
306			}
307			n = recv (fd, &c, 1, 0);
308	twoaday	260	if (n == -1) {
309			this->error = (int)WSAGetLastError ();
310	twoaday	181	break;
311	twoaday	260	}
312	twoaday	181	if (n == 0 \|\| nbuf == 0 \|\| c == '\n') {
313			if (n == 0) {
314			if (eof)
315			*eof = 1;
316			buf[i++] = '\0';
317			}
318			else {
319			buf[i++] = c;
320			buf[i] = '\0';
321			}
322			break;
323			}
324			else {
325			buf[i++] = c;
326			nbuf--;
327			}
328			} while (n > 0 && i != -1);
329
330			if (nn)
331			*nn = i;
332			return 0;
333			}
334
335
336
337			/* Extract the host from the given url @url. Return the host in
338			@host and also return the resource part of the url in @new_url. */
339			int
340	twoaday	314	NetHTTP::extractHostInfo (const char _url, char _host, char *new_url)
341	twoaday	262	{
342			char tmpbuf[2*MAX_PATH+1];
343	twoaday	181	char *p;
344
345			*_host = NULL;
346			*new_url = NULL;
347
348			/* XXX: do not use static buffers. */
349			memset (tmpbuf, 0, sizeof (tmpbuf));
350	twoaday	271	strncpy (tmpbuf, _url, DIM (tmpbuf)-1);
351	twoaday	181
352			p = "http://";
353	twoaday	314	if (strlen (_url) < 10 \|\| strncmp (_url, p, strlen (p)))
354	twoaday	181	return WPTERR_GENERAL;
355			_url += strlen (p);
356			p = strtok (tmpbuf+7, "/");
357			if (!p)
358			return WPTERR_GENERAL;
359	twoaday	262	*_host = strdup (p);
360	twoaday	181	p = strchr (_url, '/');
361	twoaday	314	/* if no document were given so we assume the root '/'. */
362			*new_url = !p? strdup ("/") : strdup (p);
363
364	twoaday	181	return 0;
365			}
366
367
368			/* Add a request header. */
369			int
370	twoaday	314	NetHTTP::addRequestHeader (const char name, const char val)
371	twoaday	181	{
372	twoaday	314	StringBuffer p;
373	twoaday	181
374	twoaday	314	p = p + name + ": " + val;
375			addHeader (&req_headers, p.getBuffer ());
376	twoaday	181	return 0;
377			}
378
379
380			void
381	twoaday	314	NetHTTP::setVersion (int _ver)
382	twoaday	181	{
383			if (_ver > 9)
384			_ver = 0;
385			this->ver = _ver;
386			}
387
388
389			int
390	twoaday	314	NetHTTP::addRequestHeader (const char *name, unsigned int val)
391	twoaday	181	{
392			char buf[32];
393
394			sprintf (buf, "%lu", (DWORD)val);
395			return addRequestHeader (name, buf);
396			}
397
398
399			/* Prepare the request resource @url and send
400			it to host @host (port @port). */
401			int
402	twoaday	314	NetHTTP::sendRequest (const char _host, int _port, const char _url)
403	twoaday	181	{
404			const char *id[] = {"GET", "HEAD", "PUT", "POST"};
405			http_head_t h;
406	twoaday	314	StringBuffer out;
407	twoaday	181	int n;
408
409	twoaday	314	if (this->fd == 0) {
410			int rc = connect (_host, _port);
411	twoaday	181	if (rc)
412			return rc;
413			}
414
415			if (*_url == '/')
416	twoaday	214	_url++;
417	twoaday	181	if (_url == NULL)
418			_url = "";
419
420			addRequestHeader ("Host", _host);
421			if (ver < 1)
422			addRequestHeader ("Connection", "close");
423
424	twoaday	314	out = out + id[method] + " " + "/" + _url + " " + "HTTP/1." + (int)ver + "\r\n";
425	twoaday	181	for (h = req_headers; h; h = h->next)
426	twoaday	314	out = out + h->d + "\r\n";
427			out = out + "\r\n";
428
429			n = write (out.getBuffer (), strlen (out.getBuffer ()));
430			log_box ("debug", 0, "%d", n);
431	twoaday	181	return n > 0? 0 : WPTERR_GENERAL;
432			}
433
434
435			/* Parse all response resp_headers. */
436			int
437	twoaday	314	NetHTTP::parseHeaders (http_head_t *r_head)
438	twoaday	181	{
439			char buf[300];
440			int nn;
441			int rc;
442
443			if (!r_head)
444			return WPTERR_GENERAL;
445
446			do {
447	twoaday	262	rc = readLine (buf, DIM (buf)-1, 1, &nn, NULL);
448	twoaday	181	if (rc)
449			return rc;
450			if (nn == 2)
451			break; /* reach empty line */
452			addHeader (r_head, buf);
453			} while (rc == 0);
454			return 0;
455			}
456
457
458	twoaday	314	/* Default buffer size */
459			#define BUFSIZE 1024
460
461
462	twoaday	181	/* Read data from the response and write it to @out. */
463			int
464	twoaday	314	NetHTTP::readData (FILE *out)
465	twoaday	181	{
466			const char *val;
467	twoaday	314	char buf[BUFSIZE+1];
468			int nlen, nn = 0, n, eof=0;
469	twoaday	181	int rc = 0;
470
471			if (this->fd == 0 \|\| this->resp_headers == NULL)
472			return -1;
473
474			nlen = getContentLength ();
475			if (nlen == 0) {
476			if (!findHeader (resp_headers, "Connection", &val) \|\|
477			strnicmp (val, "close", 4))
478			return WPTERR_GENERAL;
479			}
480
481			val = getContentType ();
482			if (!val)
483			return WPTERR_GENERAL;
484			if (strnicmp (val, "text", 4)) { /* binary */
485			do {
486	twoaday	314	n = recv (fd, buf, nlen > BUFSIZE? BUFSIZE : nlen, 0);
487	twoaday	260	if (n == -1) {
488			this->error = (int)WSAGetLastError ();
489	twoaday	181	return SOCKET_ERROR;
490	twoaday	260	}
491	twoaday	181	if (n == 0)
492			break;
493			nlen -= n;
494			fwrite (buf, 1, n, out);
495			} while (nlen > 0);
496			return 0;
497			}
498
499			do {
500	twoaday	262	rc = readLine (buf, DIM (buf)-1, 1, &n, &eof);
501	twoaday	181	if (rc)
502			return rc;
503			if (n > 0)
504			fwrite (buf, 1, n, out);
505			if (nlen > 0) {
506			nn += n;
507			if (nlen == nn)
508			break;
509			}
510			} while (eof == 0);
511
512			return 0;
513			}
514
515
516			/* Parse the HTTP response line. */
517			int
518	twoaday	314	NetHTTP::parseResponse (int *_statcode)
519	twoaday	181	{
520			http_head_t n;
521			const char tmp, p;
522			char buf[300];
523			int code = 0, nn = 0;
524			int rc;
525
526			*_statcode = 0;
527	twoaday	314	rc = readLine (buf, DIM (buf)-1, 1, &nn, NULL);
528	twoaday	181	if (rc)
529			return rc;
530
531			tmp = "HTTP/1.";
532			if (strlen (buf) < 8 \|\| strncmp (buf, tmp, strlen (tmp)))
533			return WPTERR_GENERAL;
534			p = buf;
535			p += strlen (tmp)+1 + 1; /* skip HTTP/1.x and WS */
536			*_statcode = atoi (p);
537			if (tmp == 0)
538			return WPTERR_GENERAL;
539			p += 3 + 1; /* number + WS */
540
541			if (code == HTTP_STAT_400 \|\|
542			code == HTTP_STAT_403 \|\|
543			code == HTTP_STAT_404 \|\|
544			code == HTTP_STAT_405)
545			return WPTERR_GENERAL;
546
547			while (resp_headers) {
548			n = resp_headers->next;
549			free (resp_headers);
550			resp_headers = n;
551			}
552			resp_headers = NULL;
553	twoaday	314	rc = parseHeaders (&resp_headers);
554			if (rc)
555			return rc;
556			return 0;
557	twoaday	181	}
558
559
560	twoaday	314	/* Destroy HTTP object. */
561			NetHTTP::~NetHTTP (void)
562	twoaday	181	{
563			http_head_t h;
564
565	twoaday	314	while (resp_headers) {
566	twoaday	181	h = resp_headers->next;
567			free (resp_headers);
568			resp_headers = h;
569			}
570	twoaday	314	while (req_headers) {
571	twoaday	181	h = req_headers->next;
572			free (req_headers);
573			req_headers = h;
574			}
575	twoaday	314	safe_free (url);
576	twoaday	310	safe_free (host);
577	twoaday	200	if (fd != 0) {
578	twoaday	181	closesocket (fd);
579	twoaday	200	fd = 0;
580			}
581	twoaday	181	}
582
583
584	twoaday	200	/* Read @buflen bytes from the http stream into the buffer @buf. */
585	twoaday	181	int
586	twoaday	314	NetHTTP::read (void *buf, unsigned int buflen)
587	twoaday	181	{
588			int n;
589
590			if (this->fd == 0 \|\| this->resp_headers == NULL)
591			return -1;
592			if (method != HTTP_GET)
593			return -1;
594
595			if (nleft == -1)
596			nleft = getContentLength ();
597			if ((int)buflen > nleft)
598			buflen = nleft;
599			if (nleft == 0)
600			return -1;
601
602			n = recv (fd, (char*)buf, (int)buflen, 0);
603			if (n > 0) {
604			nleft -= n;
605	twoaday	314	if (nleft < 0)
606			nleft = 0;
607	twoaday	181	}
608			return n;
609			}
610
611
612	twoaday	314	/* Write the buffer @buf to the http stream.
613			The function should be considered general as a replacement
614			for send() to make sure the entire buffer is written. */
615	twoaday	181	int
616	twoaday	314	NetHTTP::write (const void *buf, unsigned int buflen)
617	twoaday	181	{
618	twoaday	314	const char buffer = (const char)buf;
619			unsigned int bytesleft = buflen;
620			int nwritten;
621
622	twoaday	181	if (this->fd == 0)
623			return -1;
624	twoaday	314
625			while (bytesleft > 0) {
626			nwritten = send (this->fd, buffer, bytesleft, 0);
627			if (nwritten == -1)
628			return -1;
629			bytesleft -= nwritten;
630			buffer += nwritten;
631			}
632			return buflen;
633	twoaday	181	}
634	twoaday	200
635
636	twoaday	260	/* Return the Winsock specific error code. */
637	twoaday	314	int NetHTTP::getErrorCode (void)
638	twoaday	200	{
639			return error;
640			}