47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
#include <libowfat/stralloc.h>
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#include <libowfat/buffer.h>
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#include <libowfat/errmsg.h>
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#include <libowfat/str.h>
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#include <ctype.h>
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#define AUTH_HEADER "authorization: bearer "
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#define AUTH_HEADER_LEN str_len(AUTH_HEADER)
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static int startswithlower(stralloc *sa, char *prefix, size_t prefixlen)
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{
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size_t i;
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if (sa->len < prefixlen) return 0;
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for (i=0;i<prefixlen;i++)
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if (tolower(sa->s[i]) != prefix[i])
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return 0;
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return 1;
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}
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int parse_token(buffer *b, stralloc *result)
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{
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stralloc line;
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int r;
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stralloc_init(result);
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stralloc_init(&line);
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for (;;) {
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r=buffer_getnewline_sa(b,&line);
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if (r==0) break;
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if (r<0) { carpsys("read line"); goto err; }
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/* header field names are case-sensitive
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* https://www.rfc-editor.org/info/rfc7230/#section-3.2 */
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if (startswithlower(&line,AUTH_HEADER,AUTH_HEADER_LEN)) {
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stralloc_chomp(&line);
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if (!stralloc_copyb(result, line.s+AUTH_HEADER_LEN,
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line.len-AUTH_HEADER_LEN)
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) { carpsys("out of memory"); goto err; }
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break;
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}
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}
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stralloc_free(&line);
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return 1;
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err:
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stralloc_free(&line);
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return 0;
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}
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