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// The contents of this file are subject to the Mozilla Public License
// Version 1.0 (the "License"); you may not use this file except in
// compliance with the License. You may obtain a copy of the License at
// http://www.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
// License for the specific language governing rights and limitations
// under the License.
//
// The Original Code is the Berkeley Open Infrastructure for Network Computing.
//
// The Initial Developer of the Original Code is the SETI@home project.
// Portions created by the SETI@home project are Copyright (C) 2002
// University of California at Berkeley. All Rights Reserved.
//
// Contributor(s):
//
#include "windows_cpp.h"
#include <string.h>
#ifdef _WIN32
#include "winsock.h"
#endif
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "error_numbers.h"
#include "filesys.h"
#include "log_flags.h"
#include "http.h"
#define HTTP_BLOCKSIZE 4096
// Breaks a url down into its server and file path components
// TODO: deal with alternate protocols (ftp, gopher, etc) or disallow
// them and parse accordingly
//
static void parse_url(char* url, char* host, char* file) {
char* p;
char buf[256];
if(url==NULL) {
fprintf(stderr, "error: parse_url: unexpected NULL pointer url\n");
}
if(host==NULL) {
fprintf(stderr, "error: parse_url: unexpected NULL pointer host\n");
}
if(file==NULL) {
fprintf(stderr, "error: parse_url: unexpected NULL pointer file\n");
}
if (strncmp(url, "http://", 7) == 0) strcpy(buf, url+7);
else strcpy(buf, url);
p = strchr(buf, '/');
if (p) {
strcpy(file, p+1);
*p = 0;
} else {
strcpy(file, "");
}
strcpy(host, buf);
}
// Note: HTTP 1.1 keeps connection open.
// We use 1.0 so we don't have to count bytes.
//
// Prints an HTTP 1.0 GET request header into buf
//
static void http_get_request_header(
char* buf, char* host, char* file, double offset
) {
if(buf==NULL) {
fprintf(stderr, "error: http_get_request_header: unexpected NULL pointer buf\n");
}
if(host==NULL) {
fprintf(stderr, "error: http_get_request_header: unexpected NULL pointer host\n");
}
if(file==NULL) {
fprintf(stderr, "error: http_get_request_header: unexpected NULL pointer file\n");
}
if(offset<0) {
fprintf(stderr, "error: http_get_request_header: negative offset\n");
}
if (offset) {
sprintf(buf,
"GET /%s;byte-range %12.0f- HTTP/1.0\015\012"
"User-Agent: BOINC client\015\012"
"Host: %s:80\015\012"
"Accept: */*\015\012"
"\015\012",
file, offset,
host
);
} else {
sprintf(buf,
"GET /%s HTTP/1.0\015\012"
"User-Agent: BOINC client\015\012"
"Host: %s:80\015\012"
"Accept: */*\015\012"
"\015\012",
file,
host
);
}
}
// Prints an HTTP 1.0 HEAD request header into buf
//
static void http_head_request_header(char* buf, char* host, char* file) {
if(buf==NULL) {
fprintf(stderr, "error: http_head_request_header: unexpected NULL pointer buf\n");
}
if(host==NULL) {
fprintf(stderr, "error: http_head_request_header: unexpected NULL pointer host\n");
}
if(file==NULL) {
fprintf(stderr, "error: http_head_request_header: unexpected NULL pointer file\n");
}
sprintf(buf,
"HEAD /%s HTTP/1.0\015\012"
"User-Agent: BOINC client\015\012"
"Host: %s:80\015\012"
"Accept: */*\015\012"
"\015\012",
file, host
);
}
// Prints an HTTP 1.0 POST request header into buf
//
static void http_post_request_header(
char* buf, char* host, char* file, int size
) {
if(buf==NULL) {
fprintf(stderr, "error: http_post_request_header: unexpected NULL pointer buf\n");
}
if(host==NULL) {
fprintf(stderr, "error: http_post_request_header: unexpected NULL pointer host\n");
}
if(file==NULL) {
fprintf(stderr, "error: http_post_request_header: unexpected NULL pointer file\n");
}
if(size<0) {
fprintf(stderr, "error: http_post_request_header: negative size\n");
}
sprintf(buf,
"POST /%s HTTP/1.0\015\012"
"Pragma: no-cache\015\012"
"Cache-Control: no-cache\015\012"
"Host: %s:80\015\012"
"Content-Type: application/octet-stream\015\012"
"Content-Length: %d\015\012"
"\015\012",
file, host, size
);
}
#if 0
// Do we still need this?
//
void http_put_request_header(
char* buf, char* host, char* file, int size, int offset
) {
if(buf==NULL) {
fprintf(stderr, "error: http_put_request_header: unexpected NULL pointer buf\n");
}
if(host==NULL) {
fprintf(stderr, "error: http_put_request_header: unexpected NULL pointer host\n");
}
if(file==NULL) {
fprintf(stderr, "error: http_put_request_header: unexpected NULL pointer file\n");
}
if(size<0) {
fprintf(stderr, "error: http_put_request_header: negative size\n");
}
if(offset<0) {
fprintf(stderr, "error: http_put_request_header: negative offset\n");
}
if (offset) {
sprintf(buf,
"PUT /%s;byte-range %d- HTTP/1.0\015\012"
"Pragma: no-cache\015\012"
"Cache-Control: no-cache\015\012"
"Host: %s:80\015\012"
"Content-Type: application/octet-stream\015\012"
"Content-Length: %d\015\012"
"\015\012",
file, offset,
host, size
);
} else {
sprintf(buf,
"PUT /%s HTTP/1.0\015\012"
"Pragma: no-cache\015\012"
"Cache-Control: no-cache\015\012"
"Host: %s:80\015\012"
"Content-Type: application/octet-stream\015\012"
"Content-Length: %d\015\012"
"\015\012",
file,
host, size
);
}
}
#endif
// Parse an http reply header into the header struct
//
int read_http_reply_header(int socket, HTTP_REPLY_HEADER& header) {
int i, n;
char buf[1024], *p;
if(socket<0) {
fprintf(stderr, "error: read_http_reply_header: negative socket\n");
return ERR_NEG;
}
memset(buf, 0, sizeof(buf));
header.content_length = 0;
header.status = 404; // default to failure
for (i=0; i<1024; i++) {
n = recv(socket, buf+i, 1, 0);
if (strstr(buf, "\r\n\r\n") || strstr(buf, "\n\n")) {
if (log_flags.http_debug) printf("reply header:\n%s", buf);
p = strchr(buf, ' ');
if (p) {
header.status = atoi(p+1);
}
p = strstr(buf, "Content-Length: ");
if (p) {
header.content_length = atoi(p+strlen("Content-Length: "));
}
p = strstr(buf, "Location: ");
if (p) {
// TODO: Is there a better way to do this?
n = 0;
p += strlen( "Location: " );
while (p[n] != '\n' && p[n] != '\r') {
header.redirect_location[n] = p[n];
n++;
}
p[n] = '\0';
}
return 0;
}
}
return 1;
}
// Read the contents of the socket into buf
//
static int read_reply(int socket, char* buf, int len) {
int i, n;
if(socket<0) {
fprintf(stderr, "error: read_reply: negative socket\n");
return ERR_NEG;
}
if(buf==NULL) {
fprintf(stderr, "error: read_reply: unexpected NULL pointer buf\n");
return ERR_NULL;
}
if(len<0) {
fprintf(stderr, "error: read_reply: negative len\n");
return ERR_NEG;
}
for (i=0; i<len-1; i++) {
n = recv(socket, buf+i, 1, 0);
if (n != 1) break;
}
buf[i] = 0;
return 0;
}
HTTP_OP::HTTP_OP() {
http_op_state = HTTP_STATE_IDLE;
strcpy(hostname,"");
strcpy(filename,"");
req1 = NULL;
strcpy(infile,"");
strcpy(outfile,"");
content_length = 0;
file_offset = 0;
strcpy(request_header,"");
http_op_state = HTTP_STATE_IDLE;
http_op_type = HTTP_OP_NONE;
http_op_retval = 0;
}
HTTP_OP::~HTTP_OP() {
}
// Initialize HTTP HEAD operation to url
//
int HTTP_OP::init_head(char* url) {
if(url==NULL) {
fprintf(stderr, "error: HTTP_OP.init_head: unexpected NULL pointer url\n");
return ERR_NULL;
}
parse_url(url, hostname, filename);
NET_XFER::init(hostname, 80, HTTP_BLOCKSIZE);
http_op_type = HTTP_OP_HEAD;
http_op_state = HTTP_STATE_CONNECTING;
http_head_request_header(request_header, hostname, filename);
return 0;
}
// Initialize HTTP GET operation to url
//
int HTTP_OP::init_get(char* url, char* out, bool del_old_file, double off) {
if(url==NULL) {
fprintf(stderr, "error: HTTP_OP.init_get: unexpected NULL pointer url\n");
return ERR_NULL;
}
if(out==NULL) {
fprintf(stderr, "error: HTTP_OP.init_get: unexpected NULL pointer out\n");
return ERR_NULL;
}
if(off<0) {
fprintf(stderr, "error: HTTP_OP.init_get: negative off\n");
return ERR_NEG;
}
if (del_old_file) {
unlink(out);
}
file_offset = off;
parse_url(url, hostname, filename);
NET_XFER::init(hostname, 80, HTTP_BLOCKSIZE);
strcpy(outfile, out);
http_op_type = HTTP_OP_GET;
http_op_state = HTTP_STATE_CONNECTING;
http_get_request_header(request_header, hostname, filename, (int)file_offset);
return 0;
}
// Initialize HTTP POST operation to url
//
int HTTP_OP::init_post(char* url, char* in, char* out) {
int retval;
if(url==NULL) {
fprintf(stderr, "error: HTTP_OP.init_post: unexpected NULL pointer url\n");
return ERR_NULL;
}
if(in==NULL) {
fprintf(stderr, "error: HTTP_OP.init_post: unexpected NULL pointer in\n");
return ERR_NULL;
}
if(out==NULL) {
fprintf(stderr, "error: HTTP_OP.init_post: unexpected NULL pointer out\n");
return ERR_NULL;
}
parse_url(url, hostname, filename);
NET_XFER::init(hostname, 80, HTTP_BLOCKSIZE);
strcpy(infile, in);
strcpy(outfile, out);
retval = file_size(infile, content_length);
if (retval) return retval;
http_op_type = HTTP_OP_POST;
http_op_state = HTTP_STATE_CONNECTING;
http_post_request_header(
request_header, hostname, filename, content_length
);
return 0;
}
// Initialize HTTP POST operation to url including file offset
//
int HTTP_OP::init_post2(
char* url, char* r1, char* in, double offset
) {
int retval;
if(url==NULL) {
fprintf(stderr, "error: HTTP_OP.init_post2: unexpected NULL pointer url\n");
return ERR_NULL;
}
if(r1==NULL) {
fprintf(stderr, "error: HTTP_OP.init_post2: unexpected NULL pointer r1\n");
return ERR_NULL;
}
if(in==NULL) {
fprintf(stderr, "error: HTTP_OP.init_post2: unexpected NULL pointer in\n");
return ERR_NULL;
}
if(offset<0) {
fprintf(stderr, "error: HTTP_OP.init_post2: negative offset\n");
return ERR_NEG;
}
parse_url(url, hostname, filename);
NET_XFER::init(hostname, 80, HTTP_BLOCKSIZE);
req1 = r1;
strcpy(infile, in);
file_offset = offset;
retval = file_size(infile, content_length);
if (retval) return retval;
content_length -= (int)offset;
content_length += strlen(req1);
http_op_type = HTTP_OP_POST2;
http_op_state = HTTP_STATE_CONNECTING;
http_post_request_header(
request_header, hostname, filename, content_length
);
return 0;
}
#if 0
// Is this still needed?
int HTTP_OP::init_put(char* url, char* in, int off) {
int retval;
offset = off;
parse_url(url, hostname, filename);
NET_XFER::init(hostname, 80, HTTP_BLOCKSIZE);
strcpy(infile, in);
retval = file_size(infile, content_length);
if (retval) return retval;
http_op_type = HTTP_OP_PUT;
http_op_state = HTTP_STATE_CONNECTING;
http_put_request_header(
request_header, hostname, filename, content_length, offset
);
return 0;
}
#endif
// Returns true if the HTTP operation is complete
//
bool HTTP_OP::http_op_done() {
return (http_op_state == HTTP_STATE_DONE);
}
HTTP_OP_SET::HTTP_OP_SET(NET_XFER_SET* p) {
if(p==NULL) {
fprintf(stderr, "error: HTTP_OP_SET: unexpected NULL pointer p\n");
}
net_xfers = p;
}
// Inserts an HTTP_OP into the set
//
int HTTP_OP_SET::insert(HTTP_OP* ho) {
int retval;
if(ho==NULL) {
fprintf(stderr, "error: HTTP_OP_SET.insert: unexpected NULL pointer ho\n");
return ERR_NULL;
}
retval = net_xfers->insert(ho);
if (retval) return retval;
http_ops.push_back(ho);
return 0;
}
// Runs through the set of HTTP_OP objects in the set and decides
// what operation is appropriate for each. This section needs more
// thorough documentation, as it is fairly complex
//
bool HTTP_OP_SET::poll() {
unsigned int i;
HTTP_OP* htp;
int n;
bool action = false;
for (i=0; i<http_ops.size(); i++) {
htp = http_ops[i];
switch(htp->http_op_state) {
case HTTP_STATE_CONNECTING:
// If the op is in the connecting state, and we notice it is done
// connecting, move it to the HTTP_STATE_REQUEST_HEADER state
if (htp->is_connected) {
htp->http_op_state = HTTP_STATE_REQUEST_HEADER;
htp->want_upload = true;
action = true;
}
break;
case HTTP_STATE_REQUEST_HEADER:
if (htp->io_ready) {
action = true;
n = send(htp->socket, htp->request_header, strlen(htp->request_header), 0);
if (log_flags.http_debug) {
printf("wrote HTTP header: %d bytes\n", n);
}
htp->io_ready = false;
switch(htp->http_op_type) {
case HTTP_OP_POST:
//case HTTP_OP_PUT:
htp->http_op_state = HTTP_STATE_REQUEST_BODY;
htp->file = fopen(htp->infile, "r");
if (!htp->file) {
fprintf(stderr, "HTTP_OP: no input file %s\n", htp->infile);
htp->io_done = true;
htp->http_op_retval = ERR_FOPEN;
htp->http_op_state = HTTP_STATE_DONE;
break;
}
htp->do_file_io = true;
break;
case HTTP_OP_GET:
case HTTP_OP_HEAD:
htp->http_op_state = HTTP_STATE_REPLY_HEADER;
htp->want_upload = false;
htp->want_download = true;
break;
case HTTP_OP_POST2:
htp->http_op_state = HTTP_STATE_REQUEST_BODY1;
break;
}
}
break;
case HTTP_STATE_REQUEST_BODY1:
if (htp->io_ready) {
action = true;
n = send(htp->socket, htp->req1, strlen(htp->req1), 0);
htp->http_op_state = HTTP_STATE_REQUEST_BODY;
htp->file = fopen(htp->infile, "r");
if (!htp->file) {
fprintf(stderr, "HTTP_OP: no input file %s\n", htp->infile);
htp->io_done = true;
htp->http_op_retval = ERR_FOPEN;
htp->http_op_state = HTTP_STATE_DONE;
break;
}
fseek(htp->file, (long)htp->file_offset, SEEK_SET);
htp->io_ready = false;
htp->do_file_io = true;
}
break;
case HTTP_STATE_REQUEST_BODY:
if (htp->io_done) {
action = true;
if (log_flags.http_debug) {
printf("finished sending request body\n");
}
htp->http_op_state = HTTP_STATE_REPLY_HEADER;
fclose(htp->file);
htp->file = 0;
htp->do_file_io = false;
htp->want_upload = false;
htp->want_download = true;
htp->io_ready = false;
}
case HTTP_STATE_REPLY_HEADER:
if (htp->io_ready) {
action = true;
if (log_flags.http_debug) printf("got reply header\n");
read_http_reply_header(htp->socket, htp->hrh);
// TODO: handle all kinds of redirects here
if (htp->hrh.status == 301 || htp->hrh.status == 302) {
fprintf( stderr, "Redirect to %s\n", htp->hrh.redirect_location );
// Close the old socket
htp->close_socket();
switch (htp->http_op_type) {
case HTTP_OP_HEAD:
htp->init_head( htp->hrh.redirect_location );
break;
case HTTP_OP_GET:
// *** Not sure if delete_old_file should be true
htp->init_get( htp->hrh.redirect_location, htp->outfile, true );
break;
case HTTP_OP_POST:
htp->init_post( htp->hrh.redirect_location, htp->infile, htp->outfile );
break;
case HTTP_OP_POST2:
// TODO: Change offset to correct value
htp->init_post2( htp->hrh.redirect_location, htp->req1, htp->infile,0 );
break;
}
// Open connection to the redirected server
htp->open_server();
break;
}
if (htp->hrh.status/100 != 2) {
htp->http_op_state = HTTP_STATE_DONE;
htp->http_op_retval = htp->hrh.status;
break;
}
switch (htp->http_op_type) {
case HTTP_OP_HEAD:
htp->http_op_state = HTTP_STATE_DONE;
htp->http_op_retval = 0;
break;
case HTTP_OP_POST:
unlink(htp->outfile);
case HTTP_OP_GET:
htp->http_op_state = HTTP_STATE_REPLY_BODY;
// TODO:
// Append to a file if it already exists, otherwise
// create a new one. init_get should have already
// deleted the file if necessary
htp->file = fopen(htp->outfile, "w");
if (!htp->file) {
fprintf(stderr,
"HTTP_OP: can't open output file %s\n",
htp->outfile
);
htp->io_done = true;
htp->http_op_state = HTTP_STATE_DONE;
htp->http_op_retval = ERR_FOPEN;
break;
}
htp->do_file_io = true;
break;
case HTTP_OP_POST2:
htp->http_op_state = HTTP_STATE_REPLY_BODY;
htp->io_ready = false;
break;
#if 0
case HTTP_OP_PUT:
htp->http_op_state = HTTP_STATE_DONE;
htp->http_op_retval = 0;
#endif
}
}
break;
case HTTP_STATE_REPLY_BODY:
if (htp->io_done) {
switch(htp->http_op_type) {
case HTTP_OP_POST2:
read_reply(htp->socket, htp->req1, 256);
break;
default:
action = true;
fclose(htp->file);
htp->file = 0;
break;
}
if (log_flags.http_debug) printf("got reply body\n");
htp->http_op_state = HTTP_STATE_DONE;
htp->http_op_retval = 0;
}
break;
}
}
return action;
}
// Remove an HTTP_OP from the set
//
int HTTP_OP_SET::remove(HTTP_OP* p) {
vector<HTTP_OP*>::iterator iter;
if(p==NULL) {
fprintf(stderr, "error: HTTP_OP_SET.remove: unexpected NULL pointer p\n");
return ERR_NULL;
}
net_xfers->remove(p);
iter = http_ops.begin();
while (iter != http_ops.end()) {
if (*iter == p) {
http_ops.erase(iter);
return 0;
}
iter++;
}
fprintf(stderr, "HTTP_OP_SET::remove(): not found\n");
return 1;
}
// Returns the size of the set of HTTP_OP objects
//
int HTTP_OP_SET::size() {
return http_ops.size();
}
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