115 lines
2.2 KiB
C
115 lines
2.2 KiB
C
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "save.h"
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#include "parse.h"
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static unsigned int fletcher16_file(FILE *);
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static int item_file_exists(char *);
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static unsigned int
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fletcher16_file(FILE *fp)
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{
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unsigned int sum1 = 0, sum2 = 0;
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int c;
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while ((c = fgetc(fp)) != EOF) {
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sum1 += (sum1 + c) % 255;
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sum2 += (sum2 + sum1) % 255;
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}
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return (sum2 << 8) | sum1;
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}
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/* check if file exists already in cur/ or new/ */
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static int
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item_file_exists(char *filename)
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{
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DIR *dp;
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struct dirent *dir;
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if ((dp = opendir("cur/"))) {
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while ((dir = readdir(dp))) {
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if (strstr(dir->d_name, filename + 4)) {
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closedir(dp);
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return 1;
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}
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}
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}
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closedir(dp);
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if ((dp = opendir("new/"))) {
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while ((dir = readdir(dp))) {
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if (strstr(dir->d_name, filename + 4)) {
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closedir(dp);
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return 1;
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}
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}
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}
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closedir(dp);
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return 0;
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}
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int
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save_item(struct rss_item item, char *feedtitle)
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{
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FILE *fp;
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static char hostname[256];
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char path[512], newpath[512], line[1024];
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unsigned int digest;
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if (gethostname(hostname, sizeof(hostname)) == -1) {
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perror("failed to get hostname, setting to localhost");
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strncpy(hostname, "localhost", sizeof(hostname));
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}
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snprintf(path, sizeof(path), "tmp/%li.rssdl-tmp.%s:2,", item.epochsec, hostname);
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fp = fopen(path, "w");
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if (!fp) {
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fprintf(stderr, "failed to open %s for writing\n", path);
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goto CLEANUP;
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}
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fprintf(fp, "From: rssdl@%s\n"
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"Subject: [%s] %s\n"
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"Date: %s\n"
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"Content-Type: text/html\n"
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"\nArticle Link: %s\n\n",
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hostname, feedtitle, item.title, item.date, item.link);
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if (item.desc) {
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while (fgets(line, sizeof(line), item.desc) != NULL)
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fputs(line, fp);
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}
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fclose(fp);
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fp = fopen(path, "r");
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if (!fp) {
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fprintf(stderr, "failed to open %s for reading\n", path);
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goto CLEANUP;
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}
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digest = fletcher16_file(fp);
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snprintf(newpath, sizeof(newpath), "new/%li.%x.%s:2,", item.epochsec, digest, hostname);
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if (item_file_exists(newpath) == 1)
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goto CLEANUP;
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if (rename(path, newpath) == 0)
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puts(newpath);
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CLEANUP:
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fclose(fp);
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unlink(path);
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return 0;
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}
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