--- /dev/null
+/*
+ * Copyright (c) 2004-2005 Sergey Lyubka <valenok@gmail.com>
+ * All rights reserved
+ *
+ * "THE BEER-WARE LICENSE" (Revision 42):
+ * Sergey Lyubka wrote this file. As long as you retain this notice you
+ * can do whatever you want with this stuff. If we meet some day, and you think
+ * this stuff is worth it, you can buy me a beer in return.
+ */
+
+#include "defs.h"
+
+#if !defined(NO_CGI)
+struct env_block {
+ char buf[ENV_MAX]; /* Environment buffer */
+ int len; /* Space taken */
+ char *vars[CGI_ENV_VARS]; /* Point into the buffer */
+ int nvars; /* Number of variables */
+};
+
+/*
+ * UNIX socketpair() implementation. Why? Because Windows does not have it.
+ * Return 0 on success, -1 on error.
+ */
+static int
+my_socketpair(struct conn *c, int sp[2])
+{
+ struct sockaddr_in sa;
+ int sock, ret = -1;
+ socklen_t len = sizeof(sa);
+
+ (void) memset(&sa, 0, sizeof(sa));
+ sa.sin_family = AF_INET;
+ sa.sin_port = htons(0);
+ sa.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+
+ if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
+ elog(E_LOG, c, "mysocketpair: socket(): %d", ERRNO);
+ } else if (bind(sock, (struct sockaddr *) &sa, len) != 0) {
+ elog(E_LOG, c, "mysocketpair: bind(): %d", ERRNO);
+ (void) closesocket(sock);
+ } else if (listen(sock, 1) != 0) {
+ elog(E_LOG, c, "mysocketpair: listen(): %d", ERRNO);
+ (void) closesocket(sock);
+ } else if (getsockname(sock, (struct sockaddr *) &sa, &len) != 0) {
+ elog(E_LOG, c, "mysocketpair: getsockname(): %d", ERRNO);
+ (void) closesocket(sock);
+ } else if ((sp[0] = socket(AF_INET, SOCK_STREAM, 6)) == -1) {
+ elog(E_LOG, c, "mysocketpair: socket(): %d", ERRNO);
+ (void) closesocket(sock);
+ } else if (connect(sp[0], (struct sockaddr *) &sa, len) != 0) {
+ elog(E_LOG, c, "mysocketpair: connect(): %d", ERRNO);
+ (void) closesocket(sock);
+ (void) closesocket(sp[0]);
+ } else if ((sp[1] = accept(sock,(struct sockaddr *) &sa, &len)) == -1) {
+ elog(E_LOG, c, "mysocketpair: accept(): %d", ERRNO);
+ (void) closesocket(sock);
+ (void) closesocket(sp[0]);
+ } else {
+ /* Success */
+ ret = 0;
+ (void) closesocket(sock);
+ }
+
+#ifndef _WIN32
+ (void) fcntl(sp[0], F_SETFD, FD_CLOEXEC);
+ (void) fcntl(sp[1], F_SETFD, FD_CLOEXEC);
+#endif /* _WIN32*/
+
+ return (ret);
+}
+
+static void
+addenv(struct env_block *block, const char *fmt, ...)
+{
+ int n, space;
+ va_list ap;
+
+ space = sizeof(block->buf) - block->len - 2;
+ assert(space >= 0);
+
+ va_start(ap, fmt);
+ n = vsnprintf(block->buf + block->len, space, fmt, ap);
+ va_end(ap);
+
+ if (n > 0 && n < space && block->nvars < CGI_ENV_VARS - 2) {
+ block->vars[block->nvars++] = block->buf + block->len;
+ block->len += n + 1; /* Include \0 terminator */
+ }
+}
+
+static void
+add_http_headers_to_env(struct env_block *b, const char *s, int len)
+{
+ const char *p, *v, *e = s + len;
+ int space, n, i, ch;
+
+ /* Loop through all headers in the request */
+ while (s < e) {
+
+ /* Find where this header ends. Remember where value starts */
+ for (p = s, v = NULL; p < e && *p != '\n'; p++)
+ if (v == NULL && *p == ':')
+ v = p;
+
+ /* 2 null terminators and "HTTP_" */
+ space = (sizeof(b->buf) - b->len) - (2 + 5);
+ assert(space >= 0);
+
+ /* Copy header if enough space in the environment block */
+ if (v > s && p > v + 2 && space > p - s) {
+
+ /* Store var */
+ if (b->nvars < (int) NELEMS(b->vars) - 1)
+ b->vars[b->nvars++] = b->buf + b->len;
+
+ (void) memcpy(b->buf + b->len, "HTTP_", 5);
+ b->len += 5;
+
+ /* Copy header name. Substitute '-' to '_' */
+ n = v - s;
+ for (i = 0; i < n; i++) {
+ ch = s[i] == '-' ? '_' : s[i];
+ b->buf[b->len++] = toupper(ch);
+ }
+
+ b->buf[b->len++] = '=';
+
+ /* Copy header value */
+ v += 2;
+ n = p[-1] == '\r' ? (p - v) - 1 : p - v;
+ for (i = 0; i < n; i++)
+ b->buf[b->len++] = v[i];
+
+ /* Null-terminate */
+ b->buf[b->len++] = '\0';
+ }
+
+ s = p + 1; /* Shift to the next header */
+ }
+}
+
+static void
+prepare_environment(const struct conn *c, const char *prog,
+ struct env_block *blk)
+{
+ const struct headers *h = &c->ch;
+ const char *s;
+ size_t len;
+
+ blk->len = blk->nvars = 0;
+
+ /* Prepare the environment block */
+ addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1");
+ addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1");
+ addenv(blk, "%s", "REDIRECT_STATUS=200"); /* PHP */
+ addenv(blk, "SERVER_PORT=%d", c->loc_port);
+ addenv(blk, "SERVER_NAME=%s", c->ctx->auth_realm);
+ addenv(blk, "SERVER_ROOT=%s", c->ctx->document_root);
+ addenv(blk, "DOCUMENT_ROOT=%s", c->ctx->document_root);
+ addenv(blk, "REQUEST_METHOD=%s", known_http_methods[c->method].ptr);
+ addenv(blk, "REMOTE_ADDR=%s", inet_ntoa(c->sa.u.sin.sin_addr));
+ addenv(blk, "REMOTE_PORT=%hu", ntohs(c->sa.u.sin.sin_port));
+ addenv(blk, "REQUEST_URI=%s", c->uri);
+ addenv(blk, "SCRIPT_NAME=%s", prog + strlen(c->ctx->document_root));
+ addenv(blk, "SCRIPT_FILENAME=%s", prog); /* PHP */
+ addenv(blk, "PATH_TRANSLATED=%s", prog);
+
+ if (h->ct.v_vec.len > 0)
+ addenv(blk, "CONTENT_TYPE=%.*s",
+ h->ct.v_vec.len, h->ct.v_vec.ptr);
+
+ if (c->query != NULL)
+ addenv(blk, "QUERY_STRING=%s", c->query);
+
+ if (c->path_info != NULL)
+ addenv(blk, "PATH_INFO=/%s", c->path_info);
+
+ if (h->cl.v_big_int > 0)
+ addenv(blk, "CONTENT_LENGTH=%lu", h->cl.v_big_int);
+
+ if ((s = getenv("PATH")) != NULL)
+ addenv(blk, "PATH=%s", s);
+
+#ifdef _WIN32
+ if ((s = getenv("COMSPEC")) != NULL)
+ addenv(blk, "COMSPEC=%s", s);
+ if ((s = getenv("SYSTEMROOT")) != NULL)
+ addenv(blk, "SYSTEMROOT=%s", s);
+#else
+ if ((s = getenv("LD_LIBRARY_PATH")) != NULL)
+ addenv(blk, "LD_LIBRARY_PATH=%s", s);
+#endif /* _WIN32 */
+
+ if ((s = getenv("PERLLIB")) != NULL)
+ addenv(blk, "PERLLIB=%s", s);
+
+ if (h->user.v_vec.len > 0) {
+ addenv(blk, "REMOTE_USER=%.*s",
+ h->user.v_vec.len, h->user.v_vec.ptr);
+ addenv(blk, "%s", "AUTH_TYPE=Digest");
+ }
+
+ /* Add user-specified variables */
+ s = c->ctx->cgi_vars;
+ FOR_EACH_WORD_IN_LIST(s, len)
+ addenv(blk, "%.*s", len, s);
+
+ /* Add all headers as HTTP_* variables */
+ add_http_headers_to_env(blk, c->headers,
+ c->rem.headers_len - (c->headers - c->request));
+
+ blk->vars[blk->nvars++] = NULL;
+ blk->buf[blk->len++] = '\0';
+
+ assert(blk->nvars < CGI_ENV_VARS);
+ assert(blk->len > 0);
+ assert(blk->len < (int) sizeof(blk->buf));
+
+ /* Debug stuff to view passed environment */
+ DBG(("%s: %d vars, %d env size", prog, blk->nvars, blk->len));
+ {
+ int i;
+ for (i = 0 ; i < blk->nvars; i++)
+ DBG(("[%s]", blk->vars[i] ? blk->vars[i] : "null"));
+ }
+}
+
+int
+run_cgi(struct conn *c, const char *prog)
+{
+ struct env_block blk;
+ char dir[FILENAME_MAX], *p;
+ int ret, pair[2];
+
+ prepare_environment(c, prog, &blk);
+
+ /* CGI must be executed in its own directory */
+ (void) my_snprintf(dir, sizeof(dir), "%s", prog);
+ for (p = dir + strlen(dir) - 1; p > dir; p--)
+ if (*p == '/') {
+ *p++ = '\0';
+ break;
+ }
+
+ if (my_socketpair(c, pair) != 0) {
+ ret = -1;
+ } else if (spawn_process(c, prog, blk.buf, blk.vars, pair[1], dir)) {
+ ret = -1;
+ (void) closesocket(pair[0]);
+ (void) closesocket(pair[1]);
+ } else {
+ ret = 0;
+ c->loc.chan.sock = pair[0];
+ }
+
+ return (ret);
+}
+
+void
+do_cgi(struct conn *c)
+{
+ DBG(("running CGI: [%s]", c->uri));
+ assert(c->loc.io.size > CGI_REPLY_LEN);
+ memcpy(c->loc.io.buf, CGI_REPLY, CGI_REPLY_LEN);
+ c->loc.io.head = c->loc.io.tail = c->loc.io.total = CGI_REPLY_LEN;
+ c->loc.io_class = &io_cgi;
+ c->loc.flags = FLAG_R;
+ if (c->method == METHOD_POST)
+ c->loc.flags |= FLAG_W;
+}
+
+#endif /* !NO_CGI */
projects / fms.git / blobdiff