2 ashd - A Sane HTTP Daemon
3 Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com>
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
33 static char **environ;
35 static void passdata(FILE *in, FILE *out)
42 ret = fread(buf, 1, 65536, in);
44 flog(LOG_ERR, "sendfile: could not read input: %s", strerror(errno));
47 if(fwrite(buf, 1, ret, out) != ret) {
48 flog(LOG_ERR, "sendfile: could not write output: %s", strerror(errno));
55 static void forkchild(char *prog, char *file, char *method, char *url, char *rest, int *infd, int *outfd)
64 if((pid = fork()) < 0) {
65 flog(LOG_ERR, "callcgi: could not fork");
73 for(i = 3; i < FD_SETSIZE; i++)
75 if((qp = strchr(url, '?')) != NULL)
78 * XXX: Currently missing:
79 * SERVER_NAME (Partially)
82 putenv(sprintf2("SERVER_SOFTWARE=ashd/%s", VERSION));
83 putenv("GATEWAY_INTERFACE=CGI/1.1");
84 if(getenv("HTTP_VERSION"))
85 putenv(sprintf2("SERVER_PROTOCOL=HTTP/%s", getenv("HTTP_VERSION")));
86 putenv(sprintf2("REQUEST_METHOD=%s", method));
87 putenv(sprintf2("PATH_INFO=%s", rest));
88 putenv(sprintf2("SCRIPT_NAME=%s", url));
89 putenv(sprintf2("QUERY_STRING=%s", qp?qp:""));
90 if(getenv("REQ_HOST"))
91 putenv(sprintf2("SERVER_NAME=%s", getenv("REQ_HOST")));
92 if(getenv("REQ_X_ASH_ADDRESS"))
93 putenv(sprintf2("REMOTE_ADDR=%s", getenv("REQ_X_ASH_ADDRESS")));
94 if(getenv("REQ_CONTENT_TYPE"))
95 putenv(sprintf2("CONTENT_TYPE=%s", getenv("REQ_CONTENT_TYPE")));
96 if(getenv("REQ_CONTENT_LENGTH"))
97 putenv(sprintf2("CONTENT_LENGTH=%s", getenv("REQ_CONTENT_LENGTH")));
98 for(env = environ; *env; env++) {
99 if(!strncmp(*env, "REQ_", 4))
100 putenv(sprintf2("HTTP_%s", (*env) + 4));
103 * This is (understandably) missing from the CGI
104 * specification, but PHP seems to require it.
106 putenv(sprintf2("SCRIPT_FILENAME=%s", file));
107 execlp(prog, prog, file, NULL);
116 static void trim(struct charbuf *buf)
120 for(p = buf->b; (p - buf->b < buf->d) && isspace(*p); p++);
121 memmove(buf->b, p, buf->d -= (p - buf->b));
122 for(p = buf->b + buf->d - 1; (p > buf->b) && isspace(*p); p--, buf->d--);
125 static char **parseheaders(FILE *s)
128 struct charvbuf hbuf;
139 } else if(c == '\n') {
141 } else if(c == EOF) {
147 } else if(state == 1) {
154 } else if(c == '\r') {
155 } else if(c == '\n') {
157 } else if(c == EOF) {
162 } else if(state == 2) {
164 } else if(c == '\n') {
170 } else if(c == EOF) {
186 static void sendstatus(char **headers, FILE *out)
189 char *status, *location;
192 status = location = NULL;
194 if(!strcasecmp(hp[0], "status")) {
196 /* Clear this header, so that it is not transmitted by sendheaders. */
198 } else if(!strcasecmp(hp[0], "location")) {
205 fprintf(out, "HTTP/1.1 %s\r\n", status);
206 } else if(location) {
207 fprintf(out, "HTTP/1.1 303 See Other\r\n");
209 fprintf(out, "HTTP/1.1 200 OK\r\n");
213 static void sendheaders(char **headers, FILE *out)
217 fprintf(out, "%s: %s\r\n", headers[0], headers[1]);
222 int main(int argc, char **argv, char **envp)
230 signal(SIGPIPE, SIG_IGN);
232 flog(LOG_ERR, "usage: callcgi PROGRAM METHOD URL REST");
235 if((file = getenv("REQ_X_ASH_FILE")) == NULL) {
236 flog(LOG_ERR, "callcgi: needs to be called with the X-Ash-File header");
239 forkchild(argv[1], file, argv[2], argv[3], argv[4], &in, &out);
240 ins = fdopen(in, "w");
241 passdata(stdin, ins);
243 outs = fdopen(out, "r");
244 if((headers = parseheaders(outs)) == NULL) {
245 flog(LOG_WARNING, "CGI handler returned invalid headers");
248 sendstatus(headers, stdout);
249 sendheaders(headers, stdout);
251 passdata(outs, stdout);