5 #define HTTPGW_MAX_CLIENT 128
11 const char * HTTPGW_HEADERS[HTTPGW_MAX_HEADER] = {
22 char* headers[HTTPGW_MAX_HEADER];
23 } http_requests[HTTPGW_MAX_CLIENT];
26 int http_gw_reqs_open = 0;
27 int http_gw_reqs_count = 0;
29 void HttpGwNewRequestCallback (SOCKET http_conn);
30 void HttpGwNewRequestCallback (SOCKET http_conn);
32 http_gw_t* HttpGwFindRequest (SOCKET sock) {
33 for(int i=0; i<http_gw_reqs_open; i++)
34 if (http_requests[i].sink==sock)
35 return http_requests+i;
40 void HttpGwCloseConnection (SOCKET sock) {
41 http_gw_t* req = HttpGwFindRequest(sock);
43 dprintf("%s @%i closed http connection %i\n",tintstr(),req->id,sock);
44 for(int i=0; i<HTTPGW_MAX_HEADER; i++)
45 if (req->headers[i]) {
46 free(req->headers[i]);
47 req->headers[i] = NULL;
49 *req = http_requests[--http_gw_reqs_open];
51 swift::close_socket(sock);
52 swift::Listen3rdPartySocket(socket_callbacks_t(sock));
56 void HttpGwMayWriteCallback (SOCKET sink) {
57 http_gw_t* req = HttpGwFindRequest(sink);
58 uint64_t complete = swift::SeqComplete(req->transfer);
59 if (complete>req->offset) { // send data
61 uint64_t tosend = std::min((uint64_t)1<<12,complete-req->offset);
62 size_t rd = pread(req->transfer,buf,tosend,req->offset); // hope it is cached
64 HttpGwCloseConnection(sink);
67 int wn = send(sink, buf, rd, 0);
69 print_error("send fails");
70 HttpGwCloseConnection(sink);
73 dprintf("%s @%i sent %ib\n",tintstr(),req->id,(int)wn);
77 if (req->tosend==0) { // done; wait for new request
78 dprintf("%s @%i done\n",tintstr(),req->id);
79 socket_callbacks_t wait_new_req(req->sink,HttpGwNewRequestCallback,NULL,HttpGwCloseConnection);
80 swift::Listen3rdPartySocket (wait_new_req);
81 } else { // wait for data
82 dprintf("%s @%i waiting for data\n",tintstr(),req->id);
83 socket_callbacks_t wait_swift_data(req->sink,NULL,NULL,HttpGwCloseConnection);
84 swift::Listen3rdPartySocket(wait_swift_data);
90 void HttpGwSwiftProgressCallback (int transfer, bin64_t bin) {
91 for (int httpc=0; httpc<http_gw_reqs_open; httpc++)
92 if (http_requests[httpc].transfer==transfer)
93 if ( (bin.base_offset()<<10) == http_requests[httpc].offset ) {
94 dprintf("%s @%i progress: %s\n",tintstr(),http_requests[httpc].id,bin.str());
95 socket_callbacks_t maywrite_callbacks
96 (http_requests[httpc].sink,NULL,HttpGwMayWriteCallback,HttpGwCloseConnection);
97 Listen3rdPartySocket (maywrite_callbacks);
102 void HttpGwFirstProgressCallback (int transfer, bin64_t bin) {
103 if (bin!=bin64_t(0,0)) // need the first packet
105 swift::RemoveProgressCallback(transfer,&HttpGwFirstProgressCallback);
106 swift::AddProgressCallback(transfer,&HttpGwSwiftProgressCallback);
107 for (int httpc=0; httpc<http_gw_reqs_open; httpc++) {
108 http_gw_t * req = http_requests + httpc;
109 if (req->transfer==transfer && req->tosend==0) { // FIXME states
110 uint64_t file_size = swift::Size(transfer);
113 "HTTP/1.1 200 OK\r\n"\
114 "Connection: keep-alive\r\n"\
115 "Content-Type: video/ogg\r\n"\
116 "X-Content-Duration: 32\r\n"\
117 "Content-Length: %lli\r\n"\
118 "Accept-Ranges: bytes\r\n"\
121 send(req->sink,response,strlen(response),0);
122 req->tosend = file_size;
123 dprintf("%s @%i headers_sent size %lli\n",tintstr(),req->id,file_size);
126 HttpGwSwiftProgressCallback(transfer,bin);
130 void HttpGwNewRequestCallback (SOCKET http_conn){
131 http_gw_t* req = http_requests + http_gw_reqs_open++;
132 req->id = ++http_gw_reqs_count;
133 req->sink = http_conn;
136 dprintf("%s @%i new http request\n",tintstr(),req->id);
137 // read headers - the thrilling part
138 // we surely do not support pipelining => one request at a time
139 #define HTTPGW_MAX_REQ_SIZE 1024
140 char buf[HTTPGW_MAX_REQ_SIZE+1];
141 int rd = recv(http_conn,buf,HTTPGW_MAX_REQ_SIZE,0);
142 if (rd<=0) { // if conn is closed by the peer, rd==0
143 HttpGwCloseConnection(http_conn);
148 char* reqline = strtok(buf,"\r\n");
149 char method[16], url[512], version[16], crlf[5];
150 if (3!=sscanf(reqline,"%16s %512s %16s",method,url,version)) {
151 HttpGwCloseConnection(http_conn);
154 // HTTP header fields
156 while (headerline=strtok(NULL,"\n\r")) {
157 char header[128], value[256];
158 if (2!=sscanf(headerline,"%120[^: ]: %250[^\r\n]",header,value)) {
159 HttpGwCloseConnection(http_conn);
162 for(int i=0; i<HTTPGW_MAX_HEADER; i++)
163 if (0==strcasecmp(HTTPGW_HEADERS[i],header) && !req->headers[i])
164 req->headers[i] = strdup(value);
167 char * hashch=strtok(url,"/"), hash[41];
168 while (hashch && (1!=sscanf(hashch,"%40[0123456789abcdefABCDEF]",hash) || strlen(hash)!=40))
169 hashch = strtok(NULL,"/");
170 if (strlen(hash)!=40) {
171 HttpGwCloseConnection(http_conn);
174 dprintf("%s @%i demands %s\n",tintstr(),req->id,hash);
175 // initiate transmission
176 Sha1Hash root_hash = Sha1Hash(true,hash);
177 int file = swift::Find(root_hash);
179 file = swift::Open(hash,root_hash);
180 req->transfer = file;
181 if (swift::Size(file)) {
182 HttpGwFirstProgressCallback(file,bin64_t(0,0));
184 swift::AddProgressCallback(file,&HttpGwFirstProgressCallback);
185 socket_callbacks_t install (http_conn,NULL,NULL,HttpGwCloseConnection);
186 swift::Listen3rdPartySocket(install);
191 // be liberal in what you do, be conservative in what you accept
192 void HttpGwNewConnectionCallback (SOCKET serv) {
193 Address client_address;
195 SOCKET conn = accept (serv, (sockaddr*) & (client_address.addr), &len);
196 if (conn==INVALID_SOCKET) {
197 print_error("client conn fails");
200 make_socket_nonblocking(conn);
201 // submit 3rd party socket to the swift loop
202 socket_callbacks_t install
203 (conn,HttpGwNewRequestCallback,NULL,HttpGwCloseConnection);
204 swift::Listen3rdPartySocket(install);
208 void HttpGwError (SOCKET s) {
209 print_error("httpgw is dead");
210 dprintf("%s @0 closed http gateway\n",tintstr());
212 swift::Listen3rdPartySocket(socket_callbacks_t(s));
217 SOCKET InstallHTTPGateway (Address bind_to) {
219 #define gw_ensure(x) { if (!(x)) { \
220 print_error("http binding fails"); close_socket(fd); \
221 return INVALID_SOCKET; } }
222 gw_ensure ( (fd=socket(AF_INET, SOCK_STREAM, 0)) != INVALID_SOCKET );
224 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (setsockoptptr_t)&enable, sizeof(int));
225 //setsockopt(fd, SOL_SOCKET, SO_NOSIGPIPE, (setsockoptptr_t)&enable, sizeof(int));
226 //struct sigaction act;
227 //memset(&act,0,sizeof(struct sigaction));
228 //act.sa_handler = SIG_IGN;
229 //sigaction (SIGPIPE, &act, NULL); // FIXME
230 signal( SIGPIPE, SIG_IGN );
231 gw_ensure ( 0==bind(fd, (sockaddr*)&(bind_to.addr), sizeof(struct sockaddr_in)) );
232 gw_ensure (make_socket_nonblocking(fd));
233 gw_ensure ( 0==listen(fd,8) );
234 socket_callbacks_t install_http(fd,HttpGwNewConnectionCallback,NULL,HttpGwError);
235 gw_ensure (swift::Listen3rdPartySocket(install_http));
236 dprintf("%s @0 installed http gateway on %s\n",tintstr(),bind_to.str());