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HTTP header parsing tweaks.

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These should slightly improve performance.
This commit is contained in:
Stephen Heumann 2018-10-08 21:18:32 -05:00
parent 21465b7f7a
commit 65c6c68936
1 changed files with 16 additions and 9 deletions
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25
http.c
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@ -4,6 +4,7 @@
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <types.h>
#include <tcpip.h>
#include <misctool.h>
@ -223,11 +224,11 @@ netRetry:
goto errorReturn;
response++;
while (*response != '\r' && response < responseEnd)
while (*response != '\r')
response++;
response++;
if (*response != '\n' && response < responseEnd)
if (*response != '\n')
goto errorReturn;
response++;
@ -270,7 +271,7 @@ netRetry:
result = UNSUPPORTED_HEADER_VALUE;
while (response < responseEnd - 2) {
while (response < responseEnd - 4) {
enum ResponseHeader header = UNKNOWN_HEADER;
if (wantRedirect) {
@ -278,23 +279,29 @@ netRetry:
response += 9;
header = LOCATION;
}
} else {
} else switch (_toupper(*response)) {
case 'C':
if (strncasecmp(response, "Content-Range:", 14) == 0) {
response += 14;
header = CONTENT_RANGE;
} else if (strncasecmp(response, "Content-Length:", 15) == 0) {
response += 15;
header = CONTENT_LENGTH;
} else if (strncasecmp(response, "Transfer-Encoding:", 18) == 0) {
response += 18;
header = TRANSFER_ENCODING;
} else if (strncasecmp(response, "Content-Encoding:", 17) == 0) {
response += 17;
header = CONTENT_ENCODING;
}
break;
case 'T':
if (strncasecmp(response, "Transfer-Encoding:", 18) == 0) {
response += 18;
header = TRANSFER_ENCODING;
}
break;
}
while ((*response == ' ' || *response == '\t') && response < responseEnd)
while (*response == ' ' || *response == '\t')
response++;
switch (header) {
@ -369,7 +376,7 @@ netRetry:
/* Unknown headers: ignored */
case UNKNOWN_HEADER:
default:
while (*response != '\r' && response < responseEnd)
while (*response != '\r')
response++;
break;
}