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/*
* Routines to read headers of the style found in HTTP and mail
*
* Part of HTML-XML-utils, see:
* http://www.w3.org/Tools/HTML-XML-utils/
*
* Copyright © 2008 World Wide Web Consortium
* See http://www.w3.org/Consortium/Legal/copyright-software
*
* Author: Bert Bos <bert@w3.org>
* Created: 6 August 2008
*/
#include "config.h"
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <stdbool.h>
#include "export.h"
#include "heap.e"
#include "types.e"
#include "dict.e"
#define BUFLEN 4096 /* Max len of header lines */
/* read_mail_headers -- read mail-style headers into headers, false on error */
EXPORT bool read_mail_headers(FILE *f, Dictionary headers)
{
int i;
string p, line = NULL;
char buf[BUFLEN];
/* Read first line */
if (!fgets(buf, sizeof(buf), f)) return (ferror(f) == 0);
if (!(line = strdup(buf))) return false;
/* While not read an empty line, read and process more lines */
while (line[0] != '\r' && line[0] != '\n' && fgets(buf, sizeof(buf), f)) {
i = strlen(line);
assert(i != 0);
if (line[i-1] != '\n') {
strapp(&line, buf, NULL); /* Previous fgets() didn't reach eol */
} else if (buf[0] == ' ' || buf[0] == '\t') { /* Continuation line */
if (line[i-1] == '\n') line[i-1] = '\0';
if (i > 1 && line[i-2] == '\r') line[i-2] = '\0';
strapp(&line, buf + 1, NULL);
} else {
if (!(p = strchr(line, ':'))) {free(line); return 0;} /* Syntax error */
*p = '\0';
for (p++; isspace(*p); p++) ;
for (i = strlen(p) - 1; i >= 0 && isspace(p[i]); i--) p[i] = '\0';
down(line); /* Header name to lowercase */
if (!dict_add(headers, line, p)) {free(line); return 0;}
free(line);
line = newstring(buf);
}
}
free(line);
return ferror(f) == 0;
}
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