mirror of https://github.com/nealey/eris.git
Haha, I was generating that variable
This commit is contained in:
Neale Pickett
parent
77c3ed33dd
commit
48bb066488
295
eris.c
295
eris.c
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@ -28,9 +28,9 @@
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#include "version.h"
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#ifdef __linux__
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# include <sys/sendfile.h>
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#include <sys/sendfile.h>
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#else
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# define sendfile(a, b, c, d) -1
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#define sendfile(a, b, c, d) -1
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#endif
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#ifndef min
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@ -50,28 +50,44 @@
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#define DUMP_p(v) DUMPf("%s = %p", #v, v)
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#define DUMP_buf(v, l) DUMPf("%s = %.*s", #v, (int)(l), v)
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/* Wait this long (seconds) for a valid HTTP request */
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/*
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* Wait this long (seconds) for a valid HTTP request
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*/
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#define READTIMEOUT 2
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/* Wait this long (seconds) for a non-file send to complete */
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/*
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* Wait this long (seconds) for a non-file send to complete
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*/
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#define WRITETIMEOUT 10
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/* Quit if we can't write at least this many bytes per second */
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/*
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* Quit if we can't write at least this many bytes per second
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*/
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#define MIN_WRITE_RATE 2560
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/* Wait this long for CGI to complete */
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/*
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* Wait this long for CGI to complete
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*/
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#define CGI_TIMEOUT (5*60)
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/* How long each sendfile call can take */
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/*
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* How long each sendfile call can take
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*/
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#define SENDFILE_TIMEOUT ((int)(SIZE_MAX / MIN_WRITE_RATE))
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/* Maximum size of a request header (the whole block) */
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/*
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* Maximum size of a request header (the whole block)
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*/
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#define MAXHEADERLEN 8192
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/* Maximum size of a request line */
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/*
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* Maximum size of a request line
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*/
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#define MAXREQUESTLEN 2048
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/* Maximum number of header fields */
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/*
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* Maximum number of header fields
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*/
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#define MAXHEADERFIELDS 60
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#define BUFFER_SIZE 8192
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@ -88,7 +104,9 @@ int portappend = 0;
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char *connector = NULL;
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/* Variables that persist between requests */
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/*
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* Variables that persist between requests
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*/
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int cwd;
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int keepalive = 0;
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char *remote_addr = NULL;
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@ -122,8 +140,7 @@ dolog(int code, off_t len)
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sanitize(user_agent);
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sanitize(refer);
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fprintf(stderr, "%s %d %lu %s %s %s %s\n",
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remote_addr, code, (unsigned long) len, host, user_agent, refer, path);
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fprintf(stderr, "%s %d %lu %s %s %s %s\n", remote_addr, code, (unsigned long) len, host, user_agent, refer, path);
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}
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void
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@ -131,7 +148,7 @@ header(unsigned int code, const char *httpcomment)
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{
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printf("HTTP/1.%d %u %s\r\n", http_version, code, httpcomment);
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printf("Server: %s\r\n", FNORD);
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printf("Connection: %s\r\n", keepalive?"keep-alive":"close");
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printf("Connection: %s\r\n", keepalive ? "keep-alive" : "close");
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}
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@ -154,8 +171,7 @@ badrequest(long code, const char *httpcomment, const char *message)
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if (message) {
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msglen = (strlen(message) * 2) + 15;
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printf("Content-Length: %lu\r\nContent-Type: text/html\r\n\r\n",
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(unsigned long) msglen);
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printf("Content-Length: %lu\r\nContent-Type: text/html\r\n\r\n", (unsigned long) msglen);
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printf("<title>%s</title>%s", message, message);
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}
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printf("\r\n");
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@ -201,23 +217,20 @@ void
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get_ucspi_env()
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{
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char *ucspi = getenv("PROTO");
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char *ip = NULL;
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char *port = NULL;
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if (ucspi) {
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char *p;
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/* Busybox, as usual, has the right idea */
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/*
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* Busybox, as usual, has the right idea
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*/
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if ((p = proto_getenv(ucspi, "REMOTEADDR"))) {
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remote_addr = strdup(p);
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} else {
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char *ip = proto_getenv(ucspi, "REMOTEIP");
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char *port = proto_getenv(ucspi, "REMOTEPORT");
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if (ip) {
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char buf[80];
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snprintf(buf, sizeof buf, "%s:%s", ip, port);
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remote_addr = strdup(buf);
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}
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ip = proto_getenv(ucspi, "REMOTEIP");
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port = proto_getenv(ucspi, "REMOTEPORT");
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}
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if ((p = proto_getenv(ucspi, "REMOTEINFO"))) {
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@ -225,9 +238,17 @@ get_ucspi_env()
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}
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}
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if (! remote_addr) {
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if (!ip) {
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// stunnel
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remote_addr = getenv("REMOTE_ADDR");
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ip = getenv("REMOTE_HOST");
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port = getenv("REMOTE_PORT");
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}
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if (ip) {
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char buf[80];
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snprintf(buf, sizeof buf, "%s:%s", ip, port);
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remote_addr = strdup(buf);
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}
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}
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@ -264,8 +285,7 @@ parse_options(int argc, char *argv[])
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exit(0);
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case 'h':
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default:
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fprintf(stderr, "Usage: %s [OPTIONS]\n",
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argv[0]);
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fprintf(stderr, "Usage: %s [OPTIONS]\n", argv[0]);
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fprintf(stderr, "\n");
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fprintf(stderr, "-a Enable authentication\n");
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fprintf(stderr, "-c Enable CGI\n");
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@ -292,8 +312,9 @@ sigchld(int sig)
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static void
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sigalarm_cgi(int sig)
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{
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/* send this out regardless of whether we've already sent a header,
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* to maybe help with debugging */
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/*
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* send this out regardless of whether we've already sent a header, to maybe help with debugging
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*/
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badrequest(504, "Gateway Timeout", "The CGI is being too slow.");
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}
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@ -315,7 +336,9 @@ cgi_child(const char *relpath)
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env("CONTENT_TYPE", content_type);
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}
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/* Try to change to CGI's directory */
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/*
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* Try to change to CGI's directory
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*/
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{
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char *delim = strrchr(relpath, '/');
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@ -356,7 +379,9 @@ cgi_parent(int cin, int cout, int passthru)
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nfds = cin;
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if (content_length) {
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/* have post data */
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/*
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* have post data
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*/
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FD_SET(cout, &wfds);
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if (cout > nfds) {
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nfds = cout;
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@ -367,58 +392,74 @@ cgi_parent(int cin, int cout, int passthru)
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}
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alarm(CGI_TIMEOUT);
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if (-1 == select(nfds+1, &rfds, &wfds, NULL, NULL)) {
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if (-1 == select(nfds + 1, &rfds, &wfds, NULL, NULL)) {
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break;
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}
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if (FD_ISSET(cin, &rfds)) {
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if (passthru) {
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/* Pass everything through verbatim */
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/*
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* Pass everything through verbatim
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*/
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size_t len;
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/* Re-use this big buffer */
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/*
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* Re-use this big buffer
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*/
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len = fread(cgiheader, 1, sizeof cgiheader, cinf);
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if (0 == len) {
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/* CGI is done */
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/*
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* CGI is done
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*/
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break;
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}
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fwrite(cgiheader, 1, len, stdout);
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/* Naively assume the CGI knows best about sending stuff */
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/*
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* Naively assume the CGI knows best about sending stuff
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*/
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fflush(stdout);
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size += len;
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} else {
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/* Interpret header fields */
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/*
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* Interpret header fields
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*/
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size_t readlen = (sizeof cgiheader) - cgiheaderlen;
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if (NULL == fgets(cgiheader + cgiheaderlen, readlen, cinf)) {
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/* EOF or error */
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/*
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* EOF or error
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*/
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badrequest(500, "CGI Error", "CGI output too weird");
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}
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cgiheaderlen = strlen(cgiheader);
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if ('\n' == cgiheader[cgiheaderlen - 1]) {
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/* We read a whole line */
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/*
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* We read a whole line
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*/
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size_t len;
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char *val;
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len = extract_header_field(cgiheader, &val, 0);
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if (! len) {
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/* We've read the entire header block */
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if (!len) {
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/*
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* We've read the entire header block
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*/
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passthru = 1;
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eoh();
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} else {
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if (! header_sent) {
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if (! strcasecmp(cgiheader, "Location")) {
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if (!header_sent) {
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if (!strcasecmp(cgiheader, "Location")) {
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header(302, "CGI Redirect");
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printf("%s: %s\r\n\r\n", cgiheader, val);
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dolog(302, 0);
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exit(0);
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} else if (! strcasecmp(cgiheader, "Status")) {
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} else if (!strcasecmp(cgiheader, "Status")) {
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char *txt;
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if (val) {
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code = (int)strtol(val, &txt, 10);
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code = (int) strtol(val, &txt, 10);
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} else {
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code = 0;
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}
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@ -495,7 +536,9 @@ serve_cgi(char *relpath)
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close(cin[1]);
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close(cout[0]);
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/* Eris is not this smart yet */
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/*
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* Eris is not this smart yet
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*/
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keepalive = 0;
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cgi_parent(cin[0], cout[1], 0);
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@ -521,20 +564,26 @@ serve_cgi(char *relpath)
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*/
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ssize_t
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fake_sendfile(int out_fd, int in_fd, off_t *offset, size_t count)
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fake_sendfile(int out_fd, int in_fd, off_t * offset, size_t count)
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{
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char buf[BUFFER_SIZE];
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ssize_t l, m;
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/* is mmap quicker? does it matter? */
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/*
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* is mmap quicker? does it matter?
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*/
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if (-1 == lseek(in_fd, *offset, SEEK_SET)) {
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/* We're screwed. The most helpful thing we can do now is die. */
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/*
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* We're screwed. The most helpful thing we can do now is die.
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*/
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fprintf(stderr, "Unable to seek. Dying.\n");
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exit(0);
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}
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l = read(in_fd, buf, min(count, sizeof buf));
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if (-1 == l) {
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/* Also screwed. */
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/*
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* Also screwed.
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*/
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fprintf(stderr, "Unable to read an open file. Dying.\n");
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exit(0);
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}
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@ -543,7 +592,9 @@ fake_sendfile(int out_fd, int in_fd, off_t *offset, size_t count)
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while (l) {
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m = write(out_fd, buf, l);
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if (-1 == m) {
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/* ALSO screwed. */
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/*
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* ALSO screwed.
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*/
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fprintf(stderr, "Unable to write to client: %m (req %s). Dying.\n", path);
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exit(0);
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}
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@ -595,7 +646,7 @@ serve_file(int fd, char *filename, struct stat *st)
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return;
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}
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for (remain = len; remain; ) {
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for (remain = len; remain;) {
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size_t count = min(remain, SIZE_MAX);
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ssize_t sent;
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@ -657,7 +708,7 @@ serve_idx(int fd, char *path)
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name = symlink;
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printf("[LNK] "); /* symlink */
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} else if (S_ISREG(st.st_mode)) {
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printf("%10llu", (unsigned long long)st.st_size);
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printf("%10llu", (unsigned long long) st.st_size);
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} else {
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continue; /* not a file we can provide -> skip */
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}
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@ -685,26 +736,36 @@ find_serve_file(char *relpath)
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int fd;
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struct stat st;
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/* Open fspath. If that worked, */
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/*
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* Open fspath. If that worked,
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*/
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if ((fd = open(relpath, O_RDONLY)) > -1) {
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fstat(fd, &st);
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/* If it is a directory, */
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/*
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* If it is a directory,
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*/
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if (S_ISDIR(st.st_mode)) {
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char path2[PATH_MAX];
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int fd2;
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/* Redirect if it doesn't end with / */
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if (! endswith(path, "/")) {
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/*
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* Redirect if it doesn't end with /
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*/
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if (!endswith(path, "/")) {
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header(301, "Redirect");
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printf("Location: %s/\r\n", path);
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eoh();
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return;
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}
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/* Open relpath + "index.html". If that worked,*/
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/*
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* Open relpath + "index.html". If that worked,
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*/
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snprintf(path2, sizeof path2, "%sindex.html", relpath);
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if ((fd2 = open(path2, O_RDONLY)) > -1) {
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/* serve that file and return. */
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/*
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* serve that file and return.
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*/
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fstat(fd2, &st);
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serve_file(fd2, path2, &st);
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close(fd2);
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@ -713,7 +774,7 @@ find_serve_file(char *relpath)
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} else {
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if (docgi) {
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snprintf(path2, sizeof path2, "%sindex.cgi", relpath);
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if (! stat(path2, &st)) {
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if (!stat(path2, &st)) {
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return serve_cgi(path2);
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}
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}
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@ -739,7 +800,7 @@ find_serve_file(char *relpath)
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p += 4;
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env("PATH_INFO", p);
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*p = 0;
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if (! stat(relpath, &st)) {
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if (!stat(relpath, &st)) {
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close(fd);
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return serve_cgi(relpath);
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}
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@ -757,7 +818,9 @@ handle_request()
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char buf[MAXHEADERLEN];
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char *p;
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/* Initialize globals */
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/*
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* Initialize globals
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*/
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host = NULL;
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user_agent = NULL;
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refer = NULL;
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@ -770,10 +833,14 @@ handle_request()
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alarm(READTIMEOUT);
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/* Read request line first */
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/*
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* Read request line first
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*/
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request[0] = 0;
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if (NULL == fgets(request, sizeof request, stdin)) {
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/* They must have hung up! */
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/*
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* They must have hung up!
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*/
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exit(0);
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}
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if (!strncmp(request, "GET /", 5)) {
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@ -789,7 +856,9 @@ handle_request()
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method = CONNECT;
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p = request + 8;
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} else {
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/* This also handles the case where fgets does nothing */
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/*
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* This also handles the case where fgets does nothing
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*/
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badrequest(405, "Method Not Allowed", "Unsupported HTTP method.");
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}
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@ -798,7 +867,9 @@ handle_request()
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env("REQUEST_METHOD", request);
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}
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/* Interpret path into fspath. */
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/*
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* Interpret path into fspath.
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*/
|
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path = p;
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{
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char *fsp = fspath;
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@ -817,7 +888,7 @@ handle_request()
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query_string = p + 1;
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break;
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case '%':
|
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if ((! query_string) && p[1] && p[2]) {
|
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if ((!query_string) && p[1] && p[2]) {
|
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int a = fromhex(p[1]);
|
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int b = fromhex(p[2]);
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@ -829,15 +900,17 @@ handle_request()
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break;
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}
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|
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if ((! query_string) && (fsp - fspath + 1 < sizeof fspath)) {
|
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if ((!query_string) && (fsp - fspath + 1 < sizeof fspath)) {
|
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*(fsp++) = c;
|
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}
|
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}
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*fsp = 0;
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|
||||
/* Change "/." to "/:" to keep "hidden" files such and prevent directory traversal */
|
||||
/*
|
||||
* Change "/." to "/:" to keep "hidden" files such and prevent directory traversal
|
||||
*/
|
||||
while ((fsp = strstr(fspath, "/."))) {
|
||||
*(fsp+1) = ':';
|
||||
*(fsp + 1) = ':';
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -849,10 +922,10 @@ handle_request()
|
|||
}
|
||||
|
||||
http_version = -1;
|
||||
if (! strncmp(p, "HTTP/1.", 7) && p[8] && ((p[8] == '\r') || (p[8] == '\n'))) {
|
||||
if (!strncmp(p, "HTTP/1.", 7) && p[8] && ((p[8] == '\r') || (p[8] == '\n'))) {
|
||||
http_version = p[7] - '0';
|
||||
}
|
||||
if (! ((http_version == 0) || (http_version == 1))) {
|
||||
if (!((http_version == 0) || (http_version == 1))) {
|
||||
http_version = 0;
|
||||
badrequest(505, "Version Not Supported", "HTTP version not supported");
|
||||
}
|
||||
|
|
@ -866,7 +939,9 @@ handle_request()
|
|||
env("SERVER_PROTOCOL", p);
|
||||
}
|
||||
|
||||
/* Read header fields */
|
||||
/*
|
||||
* Read header fields
|
||||
*/
|
||||
{
|
||||
char *base = buf;
|
||||
char *lastchar = base + (sizeof buf) - 2;
|
||||
|
|
@ -880,7 +955,9 @@ handle_request()
|
|||
char *name, *val;
|
||||
size_t len;
|
||||
|
||||
/* 40 is totally arbitrary here. */
|
||||
/*
|
||||
* 40 is totally arbitrary here.
|
||||
*/
|
||||
if (plen < 40) {
|
||||
badrequest(431, "Request Header Too Large", "The HTTP header block was too large");
|
||||
}
|
||||
|
|
@ -899,55 +976,67 @@ handle_request()
|
|||
}
|
||||
|
||||
len = extract_header_field(p, &val, 1);
|
||||
if (! len) {
|
||||
/* blank line */
|
||||
if (!len) {
|
||||
/*
|
||||
* blank line
|
||||
*/
|
||||
break;
|
||||
}
|
||||
if (! val) {
|
||||
if (!val) {
|
||||
badrequest(400, "Invalid header", "Unable to parse header block");
|
||||
}
|
||||
|
||||
name = p;
|
||||
|
||||
/* Set up CGI environment variables */
|
||||
/*
|
||||
* Set up CGI environment variables
|
||||
*/
|
||||
if (docgi) {
|
||||
env(cgi_name, val);
|
||||
}
|
||||
|
||||
/* By default, re-use buffer space */
|
||||
/*
|
||||
* By default, re-use buffer space
|
||||
*/
|
||||
base = cgi_name;
|
||||
|
||||
/* Handle special header fields */
|
||||
if (! strcmp(name, "HOST")) {
|
||||
/*
|
||||
* Handle special header fields
|
||||
*/
|
||||
if (!strcmp(name, "HOST")) {
|
||||
host = val;
|
||||
base = name + len + 1;
|
||||
} else if (! strcmp(name, "USER_AGENT")) {
|
||||
} else if (!strcmp(name, "USER_AGENT")) {
|
||||
user_agent = val;
|
||||
base = name + len + 1;
|
||||
} else if (! strcmp(name, "REFERER")) {
|
||||
} else if (!strcmp(name, "REFERER")) {
|
||||
refer = val;
|
||||
base = name + len + 1;
|
||||
} else if (! strcmp(name, "CONTENT_TYPE")) {
|
||||
} else if (!strcmp(name, "CONTENT_TYPE")) {
|
||||
content_type = val;
|
||||
base = name + len + 1;
|
||||
} else if (! strcmp(name, "CONTENT_LENGTH")) {
|
||||
} else if (!strcmp(name, "CONTENT_LENGTH")) {
|
||||
content_length = (size_t) strtoull(val, NULL, 10);
|
||||
} else if (! strcmp(name, "CONNECTION")) {
|
||||
if (! strcasecmp(val, "keep-alive")) {
|
||||
} else if (!strcmp(name, "CONNECTION")) {
|
||||
if (!strcasecmp(val, "keep-alive")) {
|
||||
keepalive = 1;
|
||||
} else {
|
||||
keepalive = 0;
|
||||
}
|
||||
} else if (! strcmp(name, "IF_MODIFIED_SINCE")) {
|
||||
} else if (!strcmp(name, "IF_MODIFIED_SINCE")) {
|
||||
ims = timerfc(val);
|
||||
} else if (! strcmp(name, "RANGE")) {
|
||||
/* Range: bytes=17-23 */
|
||||
/* Range: bytes=23- */
|
||||
if (! strncmp(val, "bytes=", 6)) {
|
||||
} else if (!strcmp(name, "RANGE")) {
|
||||
/*
|
||||
* Range: bytes=17-23
|
||||
*/
|
||||
/*
|
||||
* Range: bytes=23-
|
||||
*/
|
||||
if (!strncmp(val, "bytes=", 6)) {
|
||||
p = val + 6;
|
||||
range_start = (off_t) strtoull(p, &p, 10);
|
||||
if (*p == '-') {
|
||||
range_end = (off_t) strtoull(p+1, NULL, 10);
|
||||
range_end = (off_t) strtoull(p + 1, NULL, 10);
|
||||
} else {
|
||||
range_end = 0;
|
||||
}
|
||||
|
|
@ -956,8 +1045,10 @@ handle_request()
|
|||
}
|
||||
}
|
||||
|
||||
/* Try to change into the appropriate directory */
|
||||
if (! nochdir) {
|
||||
/*
|
||||
* Try to change into the appropriate directory
|
||||
*/
|
||||
if (!nochdir) {
|
||||
char fn[PATH_MAX];
|
||||
|
||||
if (host) {
|
||||
|
|
@ -976,7 +1067,7 @@ handle_request()
|
|||
case ':':
|
||||
*p = 0;
|
||||
break;
|
||||
case 'A'...'Z':
|
||||
case 'A' ... 'Z':
|
||||
*p ^= ' ';
|
||||
break;
|
||||
}
|
||||
|
|
@ -992,7 +1083,9 @@ handle_request()
|
|||
badrequest(500, "Unable to exec connector", strerror(errno));
|
||||
}
|
||||
|
||||
/* Serve the file */
|
||||
/*
|
||||
* Serve the file
|
||||
*/
|
||||
alarm(WRITETIMEOUT);
|
||||
find_serve_file(fspath);
|
||||
fflush(stdout);
|
||||
|
|
@ -1012,7 +1105,7 @@ main(int argc, char *argv[], const char *const *envp)
|
|||
|
||||
while (1) {
|
||||
handle_request();
|
||||
if (! keepalive) {
|
||||
if (!keepalive) {
|
||||
break;
|
||||
}
|
||||
if (-1 == fchdir(cwd)) {
|
||||
|
|
|
|||
Loading…
Reference in New Issue