| 1 | #include <stdlib.h> |
| 2 | #include <stdio.h> |
| 3 | #include <unistd.h> |
| 4 | #include <errno.h> |
| 5 | #include <string.h> |
| 6 | #include <sys/socket.h> |
| 7 | #include <ashd/req.h> |
| 8 | #include <ashd/resp.h> |
| 9 | #include <ashd/log.h> |
| 10 | #include <ashd/mt.h> |
| 11 | #include <ashd/mtio.h> |
| 12 | |
| 13 | #include "statserve.h" |
| 14 | |
| 15 | static struct source *sources = NULL; |
| 16 | |
| 17 | static struct source *parsesource(char *arg) |
| 18 | { |
| 19 | if(arg[strlen(arg) - 1] == '/') { |
| 20 | return(mkfssrc(arg)); |
| 21 | } else { |
| 22 | return(mkdbsrc(arg, NULL)); |
| 23 | } |
| 24 | } |
| 25 | |
| 26 | static int cached(struct hthead *req, struct fileinfo f) |
| 27 | { |
| 28 | char *hdr; |
| 29 | time_t cdate; |
| 30 | |
| 31 | if((hdr = getheader(req, "If-Modified-Since")) != NULL) { |
| 32 | cdate = parsehttpdate(hdr); |
| 33 | return((cdate > 0) && !(cdate < f.mtime)); |
| 34 | } |
| 35 | return(0); |
| 36 | } |
| 37 | |
| 38 | static void serve(struct muth *muth, va_list args) |
| 39 | { |
| 40 | vavar(struct hthead *, req); |
| 41 | vavar(int, fd); |
| 42 | FILE *out; |
| 43 | struct source *src; |
| 44 | struct fileinfo f; |
| 45 | |
| 46 | out = NULL; |
| 47 | for(src = sources; src != NULL; src = src->next) { |
| 48 | f = src->serve(src, req->rest); |
| 49 | if(f.data != NULL) |
| 50 | break; |
| 51 | } |
| 52 | if(src == NULL) { |
| 53 | simpleerror(fd, 404, "Resource not found", "The resource %s was not found", htmlquote(req->rest)); |
| 54 | goto out; |
| 55 | } |
| 56 | out = mtstdopen(fd, 1, 60, "r+"); |
| 57 | if(cached(req, f)) { |
| 58 | fprintf(out, "HTTP/1.1 304 Not Modified\n"); |
| 59 | fprintf(out, "Content-Length: 0\n"); |
| 60 | fprintf(out, "\n"); |
| 61 | } else { |
| 62 | fprintf(out, "HTTP/1.1 200 OK\n"); |
| 63 | fprintf(out, "Content-Type: %s\n", f.ctype); |
| 64 | fprintf(out, "Content-Length: %zi\n", f.sz); |
| 65 | fprintf(out, "Last-Modified: %s\n", fmthttpdate(f.mtime)); |
| 66 | fprintf(out, "\n"); |
| 67 | fwrite(f.data, 1, f.sz, out); |
| 68 | } |
| 69 | free(f.data); |
| 70 | |
| 71 | out: |
| 72 | if(out != NULL) |
| 73 | fclose(out); |
| 74 | else |
| 75 | close(fd); |
| 76 | freehthead(req); |
| 77 | } |
| 78 | |
| 79 | static void usage(FILE *out) |
| 80 | { |
| 81 | fprintf(out, "usage: statserve [-h] [-P PAGESIZE] SOURCE...\n"); |
| 82 | } |
| 83 | |
| 84 | static void listenloop(struct muth *muth, va_list args) |
| 85 | { |
| 86 | vavar(int, lfd); |
| 87 | int fd; |
| 88 | struct hthead *req; |
| 89 | struct source *src; |
| 90 | |
| 91 | while(1) { |
| 92 | block(0, EV_READ, 0); |
| 93 | if((fd = recvreq(lfd, &req)) < 0) { |
| 94 | if(errno != 0) |
| 95 | flog(LOG_ERR, "recvreq: %s", strerror(errno)); |
| 96 | break; |
| 97 | } |
| 98 | mustart(serve, req, fd); |
| 99 | for(src = sources; src != NULL; src = src->next) { |
| 100 | if(src->idle) |
| 101 | src->idle(src); |
| 102 | } |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | static void sigterm(int sig) |
| 107 | { |
| 108 | shutdown(0, SHUT_RDWR); |
| 109 | } |
| 110 | |
| 111 | static void closeall(void) |
| 112 | { |
| 113 | struct source *src; |
| 114 | |
| 115 | for(src = sources; src != NULL; src = src->next) { |
| 116 | if(src->close) |
| 117 | src->close(src); |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | int main(int argc, char **argv) |
| 122 | { |
| 123 | int c; |
| 124 | struct source *last, *src; |
| 125 | |
| 126 | while((c = getopt(argc, argv, "+hP:")) >= 0) { |
| 127 | switch(c) { |
| 128 | case 'P': |
| 129 | dbpagesize = atoi(optarg); |
| 130 | break; |
| 131 | case 'h': |
| 132 | usage(stdout); |
| 133 | return(0); |
| 134 | default: |
| 135 | usage(stderr); |
| 136 | return(1); |
| 137 | } |
| 138 | } |
| 139 | last = NULL; |
| 140 | while(optind < argc) { |
| 141 | if((src = parsesource(argv[optind++])) == NULL) { |
| 142 | closeall(); |
| 143 | return(1); |
| 144 | } |
| 145 | if(!sources) |
| 146 | sources = src; |
| 147 | if(last) |
| 148 | last->next = src; |
| 149 | last = src; |
| 150 | } |
| 151 | if(!sources) { |
| 152 | usage(stderr); |
| 153 | closeall(); |
| 154 | return(1); |
| 155 | } |
| 156 | mustart(listenloop, 0); |
| 157 | signal(SIGINT, sigterm); |
| 158 | signal(SIGTERM, sigterm); |
| 159 | ioloop(); |
| 160 | closeall(); |
| 161 | return(0); |
| 162 | } |