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-rw-r--r--networking/httpd.c137
1 files changed, 76 insertions, 61 deletions
diff --git a/networking/httpd.c b/networking/httpd.c
index bf3da36d9..da33146de 100644
--- a/networking/httpd.c
+++ b/networking/httpd.c
@@ -93,6 +93,11 @@
#include "busybox.h"
+/* amount of buffering in a pipe */
+#ifndef PIPE_BUF
+# define PIPE_BUF 4096
+#endif
+
static const char httpdVersion[] = "busybox httpd/1.35 6-Oct-2004";
static const char default_path_httpd_conf[] = "/etc";
static const char httpd_conf[] = "httpd.conf";
@@ -106,10 +111,7 @@ static const char home[] = "./";
// is checked rigorously
//#define DEBUG 1
-
-#ifndef DEBUG
-# define DEBUG 0
-#endif
+#define DEBUG 0
#define MAX_MEMORY_BUFF 8192 /* IO buffer */
@@ -885,8 +887,8 @@ static int sendHeaders(HttpResponseNum responseNum)
/* emit the current date */
strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&timer));
len = sprintf(buf,
- "HTTP/1.0 %d %s\r\nContent-type: %s\r\n"
- "Date: %s\r\nConnection: close\r\n",
+ "HTTP/1.0 %d %s\r\nContent-type: %s\r\n"
+ "Date: %s\r\nConnection: close\r\n",
responseNum, responseString, mime_type, timeStr);
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
@@ -986,7 +988,7 @@ static int sendCgi(const char *url,
int outFd;
int firstLine = 1;
int status;
- size_t post_readed_size, post_readed_idx;
+ size_t post_read_size, post_read_idx;
if (pipe(fromCgi) != 0)
return 0;
@@ -1000,7 +1002,7 @@ static int sendCgi(const char *url,
if (!pid) {
/* child process */
char *script;
- char *purl = strdup(url);
+ char *purl = xstrdup(url);
char realpath_buff[MAXPATHLEN];
if (purl == NULL)
@@ -1129,8 +1131,8 @@ static int sendCgi(const char *url,
/* parent process */
- post_readed_size = 0;
- post_readed_idx = 0;
+ post_read_size = 0;
+ post_read_idx = 0; /* for gcc */
inFd = fromCgi[0];
outFd = toCgi[1];
close(fromCgi[1]);
@@ -1147,95 +1149,108 @@ static int sendCgi(const char *url,
FD_ZERO(&readSet);
FD_ZERO(&writeSet);
FD_SET(inFd, &readSet);
- if (bodyLen > 0 || post_readed_size > 0) {
+ if (bodyLen > 0 || post_read_size > 0) {
FD_SET(outFd, &writeSet);
nfound = outFd > inFd ? outFd : inFd;
- if (post_readed_size == 0) {
+ if (post_read_size == 0) {
FD_SET(config->accepted_socket, &readSet);
if (nfound < config->accepted_socket)
nfound = config->accepted_socket;
}
/* Now wait on the set of sockets! */
- nfound = select(nfound + 1, &readSet, &writeSet, 0, NULL);
+ nfound = select(nfound + 1, &readSet, &writeSet, NULL, NULL);
} else {
if (!bodyLen) {
- close(outFd);
+ close(outFd); /* no more POST data to CGI */
bodyLen = -1;
}
- nfound = select(inFd + 1, &readSet, 0, 0, NULL);
+ nfound = select(inFd + 1, &readSet, NULL, NULL, NULL);
}
if (nfound <= 0) {
- if (waitpid(pid, &status, WNOHANG) > 0) {
- close(inFd);
- if (DEBUG && WIFEXITED(status))
- bb_error_msg("piped has exited with status=%d", WEXITSTATUS(status));
- if (DEBUG && WIFSIGNALED(status))
- bb_error_msg("piped has exited with signal=%d", WTERMSIG(status));
- break;
- }
- } else if (post_readed_size > 0 && FD_ISSET(outFd, &writeSet)) {
- count = full_write(outFd, wbuf + post_readed_idx, post_readed_size);
+ if (waitpid(pid, &status, WNOHANG) <= 0)
+ /* Weird. CGI didn't exit and no fd's
+ * are ready, yet select returned?! */
+ continue;
+ close(inFd);
+ if (DEBUG && WIFEXITED(status))
+ bb_error_msg("piped has exited with status=%d", WEXITSTATUS(status));
+ if (DEBUG && WIFSIGNALED(status))
+ bb_error_msg("piped has exited with signal=%d", WTERMSIG(status));
+ break;
+ }
+
+ if (post_read_size > 0 && FD_ISSET(outFd, &writeSet)) {
+ /* Have data from peer and can write to CGI */
+ // huh? why full_write? what if we will block?
+ // (imagine that CGI does not read its stdin...)
+ count = full_write(outFd, wbuf + post_read_idx, post_read_size);
if (count > 0) {
- post_readed_size -= count;
- post_readed_idx += count;
- if (post_readed_size == 0)
- post_readed_idx = 0;
+ post_read_idx += count;
+ post_read_size -= count;
} else {
- post_readed_size = post_readed_idx = bodyLen = 0; /* broken pipe to CGI */
+ post_read_size = bodyLen = 0; /* broken pipe to CGI */
}
- } else if (bodyLen > 0 && post_readed_size == 0 && FD_ISSET(config->accepted_socket, &readSet)) {
+ } else if (bodyLen > 0 && post_read_size == 0
+ && FD_ISSET(config->accepted_socket, &readSet)
+ ) {
+ /* We expect data, prev data portion is eaten by CGI
+ * and there *is* data to read from the peer
+ * (POST data?) */
count = bodyLen > (int)sizeof(wbuf) ? (int)sizeof(wbuf) : bodyLen;
count = safe_read(config->accepted_socket, wbuf, count);
if (count > 0) {
- post_readed_size += count;
+ post_read_size = count;
+ post_read_idx = 0;
bodyLen -= count;
} else {
bodyLen = 0; /* closed */
}
}
+
if (FD_ISSET(inFd, &readSet)) {
+ /* There is something to read from CGI */
int s = config->accepted_socket;
char *rbuf = config->buf;
-
-#ifndef PIPE_BUF
-# define PIPESIZE 4096 /* amount of buffering in a pipe */
-#else
-# define PIPESIZE PIPE_BUF
-#endif
+#define PIPESIZE PIPE_BUF
#if PIPESIZE >= MAX_MEMORY_BUFF
# error "PIPESIZE >= MAX_MEMORY_BUFF"
#endif
-
- /* There is something to read */
/* NB: was safe_read. If it *has to be* safe_read, */
/* please explain why in this comment... */
count = full_read(inFd, rbuf, PIPESIZE);
if (count == 0)
break; /* closed */
- if (count > 0) {
- if (firstLine) {
- /* full_read (above) avoids
- * "chopped up into small chunks" syndrome here */
- rbuf[count] = 0;
- /* check to see if the user script added headers */
- if (strncmp(rbuf, "HTTP/1.0 200 OK\r\n", 4) != 0) {
- /* there is no "HTTP", do it ourself */
- full_write(s, "HTTP/1.0 200 OK\r\n", 17);
- } /* hmm, maybe 'else if'? */
- if (!strstr(rbuf, "ontent-")) {
- full_write(s, "Content-type: text/plain\r\n\r\n", 28);
- }
- firstLine = 0;
+ if (count < 0)
+ continue; /* huh, error, why continue?? */
+
+ if (firstLine) {
+ /* full_read (above) avoids
+ * "chopped up into small chunks" syndrome here */
+ rbuf[count] = '\0';
+ /* check to see if the user script added headers */
+#define HTTP_200 "HTTP/1.0 200 OK\r\n\r\n"
+ if (memcmp(rbuf, HTTP_200, 4) != 0) {
+ /* there is no "HTTP", do it ourself */
+ full_write(s, HTTP_200, sizeof(HTTP_200)-1);
}
- if (full_write(s, rbuf, count) != count)
- break;
-
- if (DEBUG)
- fprintf(stderr, "cgi read %d bytes: '%.*s'\n", count, count, rbuf);
+#undef HTTP_200
+ /* Example of valid GCI without "Content-type:"
+ * echo -en "HTTP/1.0 302 Found\r\n"
+ * echo -en "Location: http://www.busybox.net\r\n"
+ * echo -en "\r\n"
+ */
+ //if (!strstr(rbuf, "ontent-")) {
+ // full_write(s, "Content-type: text/plain\r\n\r\n", 28);
+ //}
+ firstLine = 0;
}
- }
- }
+ if (full_write(s, rbuf, count) != count)
+ break;
+ if (DEBUG)
+ fprintf(stderr, "cgi read %d bytes: '%.*s'\n", count, count, rbuf);
+ } /* if (FD_ISSET(inFd)) */
+ } /* while (1) */
return 0;
}
#endif /* FEATURE_HTTPD_CGI */
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