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picohttp.c
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picohttp.c
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/*
picoweb / litheweb -- a web server and application framework
for resource constraint systems.
Copyright (C) 2012 - 2014 Wolfgang Draxinger
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "picohttp.h"
#include "picohttp_debug.h"
#include <alloca.h>
#include <string.h>
#include <stdlib.h>
#include <stdbool.h>
#include "picohttp_base64.h"
static char const PICOHTTP_STR_CRLF[] = "\r\n";
static char const PICOHTTP_STR_CLSP[] = ": ";
static char const PICOHTTP_STR_HTTP_[] = "HTTP/";
static char const PICOHTTP_STR_HOST[] = "Host";
static char const PICOHTTP_STR_SERVER[] = "Server";
static char const PICOHTTP_STR_PICOWEB[] = "picoweb/0.1";
static char const PICOHTTP_STR_ACCEPT[] = "Accept";
static char const PICOHTTP_STR_TRANSFER[] = "Transfer";
static char const PICOHTTP_STR__ENCODING[] = "-Encoding";
static char const PICOHTTP_STR_CONTENT[] = "Content";
static char const PICOHTTP_STR__TYPE[] = "-Type";
static char const PICOHTTP_STR__LENGTH[] = "-Length";
static char const PICOHTTP_STR__CODING[] = "-Coding";
static char const PICOHTTP_STR__DISPOSITION[] = "-Disposition";
static char const PICOHTTP_STR_APPLICATION_[] = "application/";
static char const PICOHTTP_STR_TEXT_[] = "text/";
static char const PICOHTTP_STR_MULTIPART_[] = "multipart/";
static char const PICOHTTP_STR_FORMDATA[] = "form-data";
static char const PICOHTTP_STR_CACHECONTROL[] = "Cache-Control";
static char const PICOHTTP_STR_CONNECTION[] = "Connection";
static char const PICOHTTP_STR_CLOSE[] = "close";
static char const PICOHTTP_STR_DATE[] = "Date";
static char const PICOHTTP_STR_EXPECT[] = "Expect";
static char const PICOHTTP_STR_BOUNDARY[] = " boundary=";
static char const PICOHTTP_STR_NAME__[] = " name=\"";
static char const PICOHTTP_STR_CHUNKED[] = "chunked";
static char const PICOHTTP_STR_WWW_AUTHENTICATE[] = "WWW-Authenticate";
static char const PICOHTTP_STR_AUTHORIZATION[] = "Authorization";
static char const PICOHTTP_STR_BASIC_[] = "Basic ";
static char const PICOHTTP_STR_DIGEST_[] = "Digest ";
static char const PICOHTTP_STR_REALM__[] = "realm=\"";
static char const PICOHTTP_STR_USERNAME__[] = "username=\"";
static char const PICOHTTP_STR_QOP_[] = "qop=";
static char const PICOHTTP_STR_NC_[] = "nc=";
/* compilation unit local function forward declarations */
static int picohttpProcessHeaders (
struct picohttpRequest * const req,
size_t const hvbuflen,
char * const headervalue,
picohttpHeaderFieldCallback headerfieldcallback,
void * const data,
int ch );
/* compilation unit local helper functions */
#if !defined(PICOHTTP_CONFIG_HAVE_LIBDJB)
/* Number formating functions modified from libdjb by
* Daniel J. Bernstein, packaged at http://www.fefe.de/djb/
*/
static size_t picohttp_fmt_uint(char *dest, unsigned int i)
{
register unsigned int len, tmp, len2;
/* first count the number of bytes needed */
for(len = 1, tmp = i;
tmp > 9;
++len )
tmp/=10;
if( dest )
for(tmp = i, dest += len, len2 = len+1;
--len2;
tmp /= 10 )
*--dest = ( tmp % 10 ) + '0';
return len;
}
#if 0
static size_t picohttp_fmt_int(char *dest,int i) {
if( i < 0 ) {
if( dest )
*dest++='-';
return picohttp_fmt_uint(dest, -i) + 1;
}
return picohttp_fmt_uint(dest, i);
}
#endif
#else
#include <djb/byte/fmt.h>
#define picohttp_fmt_uint fmt_ulong
#define picohttp_fmt_int fmt_long
#endif
static char const *picohttpStatusString(int code)
{
switch(code) {
case 200:
return "OK";
case 400:
return "Bad Request";
case 401:
return "Unauthorized";
case 403:
return "Forbidden";
case 404:
return "Not Found";
case 414:
return "Request URI Too Long";
case 422:
return "Unprocessable Entity";
case 500:
return "Internal Server Error";
case 501:
return "Not Implemented";
case 505:
return "HTTP Version Not Supported";
}
return "...";
}
void picohttpStatusResponse(
struct picohttpRequest *req, int status )
{
req->status = status;
char const * const c = picohttpStatusString(req->status);
picohttpResponseWrite(req, strlen(c), c);
}
void picohttpAuthRequired(
struct picohttpRequest *req,
char const * const realm )
{
/* FIXME: Fits only for Basic Auth!
* Adjust this for Digest Auth header */
size_t const www_authenticate_maxlen = 1 + /* terminating 0 */
sizeof(PICOHTTP_STR_BASIC_)-1 +
sizeof(PICOHTTP_STR_REALM__)-1 +
strlen(realm) +
1; /* closing '"' */
#ifdef PICOWEB_CONFIG_USE_C99VARARRAY
char www_authenticate[www_authenticate_maxlen+1];
#else
char *www_authenticate = alloca(www_authenticate_maxlen+1);
#endif
memset(www_authenticate, 0, www_authenticate_maxlen);
char *c = www_authenticate;
memcpy(c, PICOHTTP_STR_BASIC_, sizeof(PICOHTTP_STR_BASIC_)-1);
c += sizeof(PICOHTTP_STR_BASIC_)-1;
memcpy(c, PICOHTTP_STR_REALM__, sizeof(PICOHTTP_STR_REALM__)-1);
c += sizeof(PICOHTTP_STR_REALM__)-1;
for(size_t i=0; realm[i]; i++) {
*c++ = realm[i];
}
*c = '"';
req->response.www_authenticate = www_authenticate;
picohttpStatusResponse(req, PICOHTTP_STATUS_401_UNAUTHORIZED);
}
static inline bool picohttpIsCRLF(int ch)
{
return '\r' == ch
|| '\n' == ch;
}
static inline bool picohttpIsLWS(int ch)
{
return picohttpIsCRLF(ch)
|| ' ' == ch
|| '\t' == ch;
}
static int picohttpIoSkipSpace (
struct picohttpIoOps const * const ioops,
int ch)
{
for(;;ch = -1) {
if( 0 > ch ) {
ch = picohttpIoGetch(ioops);
}
if( 0 > ch
|| ( ' ' != ch && '\t' != ch ) )
break;
}
return ch;
}
static int picohttpIoSkipOverCRLF (
struct picohttpIoOps const * const ioops,
int ch)
{
for(;;ch = -1) {
if(0 > ch) {
ch = picohttpIoGetch(ioops);
}
if( 0 > ch ) {
return -1;
}
if( '\n' == ch ) {
break;
}
if( '\r' == ch ) {
ch = picohttpIoGetch(ioops);
if( 0 > ch ) {
return -1;
}
if( '\n' != ch ) {
return 0;
}
break;
}
}
ch = picohttpIoGetch(ioops);
return ch;
}
static int picohttpIoB10ToU8 (
uint8_t *i,
struct picohttpIoOps const * const ioops,
int ch )
{
if( 0 > ch )
ch = picohttpIoGetch(ioops);
while( '0' <= ch && '9' >= ch ) {
*i *= 10;
*i += (ch & 0x0f);
ch = picohttpIoGetch(ioops);
}
return ch;
}
static int picohttpIoB10ToU64 (
uint64_t *i,
struct picohttpIoOps const * const ioops,
int ch )
{
if( 0 > ch )
ch = picohttpIoGetch(ioops);
while( '0' <= ch && '9' >= ch ) {
*i *= 10;
*i += (ch & 0x0f);
ch = picohttpIoGetch(ioops);
}
return ch;
}
static int picohttpIoGetPercentCh(
struct picohttpIoOps const * const ioops )
{
char ch=0;
int chr;
if( 0 > (chr = picohttpIoGetch(ioops)))
return chr;
chr |= 0x20;
if( '0' <= chr && '9' >= chr ) {
ch = ((chr)&0x0f)<<4;
} else
if( 'a' <= chr && 'f' >= chr ) {
ch = (((chr)&0x0f) + 9)<<4;
}
if( 0 > (chr = picohttpIoGetch(ioops)))
return chr;
chr |= 0x20;
if( '0' <= chr && '9' >= chr ) {
ch |= ((chr)&0x0f);
} else
if( 'a' <= chr && 'f' >= chr ) {
ch |= (((chr)&0x0f) + 9);
}
return ch;
}
int picohttpGetch(struct picohttpRequest * const req)
{
int ch;
/* skipping over Chunked Transfer Boundaries
* if Chunked Transfer Encoding is used */
if(req->query.transferencoding == PICOHTTP_CODING_CHUNKED ) {
if( !req->query.chunklength ) {
/* this is a new chunk;
* read the length and skip to after <CR><LF> */
if( 0 > (ch = picohttpIoGetch(req->ioops)) ) {
return -1;
}
uint64_t len;
if( 0 > (ch = picohttpIoB10ToU64(
&len,
req->ioops,
ch))
) {
return ch;
}
if( 0 > (ch = picohttpIoSkipOverCRLF(req->ioops, ch)) ) {
return ch;
}
req->query.chunklength = len;
return ch;
}
if( req->query.chunklength <= req->received_octets ) {
/* If this happens the data is corrupted, or
* the client is nonconforming, or an attack is
* underway, or something entierely different,
* or all of that.
* Abort processing the query!
*/
return -1;
}
}
if( 0 <= (ch = picohttpIoGetch(req->ioops)) ) {
req->received_octets++;
} else {
return ch;
}
if(req->query.transferencoding == PICOHTTP_CODING_CHUNKED ) {
if( !req->query.chunklength <= req->received_octets ) {
/* end of chunk;
* skip over <CR><LF>, make sure the trailing '0' is
* there and read the headers, err, I mean footers
* (whatever, the header processing code will do for
* chunk footers just fine).
*/
if( '0' != (ch = picohttpIoGetch(req->ioops)) ) {
return -1;
}
if( 0 > (ch = picohttpIoGetch(req->ioops)) ) {
return -1;
}
if( 0 > (ch = picohttpProcessHeaders(
req,
0, NULL,
NULL, NULL,
ch))
) {
return ch;
}
req->received_octets =
req->query.chunklength = 0;
}
}
return ch;
}
int picohttpRead(struct picohttpRequest * const req, size_t len, char * const buf)
{
/* skipping over Chunked Transfer Boundaries
* if Chunked Transfer Encoding is used */
if(req->query.transferencoding == PICOHTTP_CODING_CHUNKED ) {
if( !req->query.chunklength ) {
int ch;
/* this is a new chunk;
* read the length and skip to after <CR><LF> */
if( 0 > (ch = picohttpIoGetch(req->ioops)) ) {
return -1;
}
uint64_t len;
if( 0 > (ch = picohttpIoB10ToU64(
&len,
req->ioops,
ch))
) {
return ch;
}
if( 0 > (ch = picohttpIoSkipOverCRLF(req->ioops, ch)) ) {
return ch;
}
req->query.chunklength = len;
return ch;
}
if( req->query.chunklength <= req->received_octets ) {
/* If this happens the data is corrupted, or
* the client is nonconforming, or an attack is
* underway, or something entierely different,
* or all of that.
* Abort processing the query!
*/
return -1;
}
}
if( req->received_octets + len > req->query.chunklength ) {
len = req->query.chunklength - req->received_octets;
}
int r = picohttpIoRead(req->ioops, len, buf);
if(req->query.transferencoding == PICOHTTP_CODING_CHUNKED ) {
if( !req->query.chunklength <= req->received_octets ) {
int ch;
/* end of chunk;
* skip over <CR><LF>, make sure the trailing '0' is
* there and read the headers, err, I mean footers
* (whatever, the header processing code will do for
* chunk footers just fine).
*/
if( '0' != (ch = picohttpIoGetch(req->ioops)) ) {
return -1;
}
if( 0 > (ch = picohttpIoGetch(req->ioops)) ) {
return -1;
}
if( 0 > (ch = picohttpProcessHeaders(
req,
0, NULL,
NULL, NULL,
ch))
) {
return ch;
}
req->received_octets =
req->query.chunklength = 0;
}
}
return r;
}
/* TODO:
* It is possible to do in-place pattern matching on the route definition
* array, without first reading in the URL and then processing it here.
*
* Implement this to improve memory footprint reduction.
*/
static size_t picohttpMatchURL(
char const * const urlhead,
char const * const url )
{
size_t len_urlhead = strlen(urlhead);
size_t j;
for(j = 0; j < len_urlhead; j++) {
if( '|' == urlhead[j] ) {
/* hard URL termination */
if( url[j] ) {
return 0;
}
break;
}
if( '\\' == urlhead[j] ) {
/* soft URL termination, i.e. URL may be terminated
* by an optional '/' character */
if( url[j] && !( url[j] == '/' && !url[j+1] ) ) {
return 0;
}
break;
}
if( urlhead[j] != url[j] ) {
return 0;
}
}
if( url[j] && url[j] != '/' ) {
return 0;
}
return j;
}
static int picohttpMatchRoute(
struct picohttpRequest * const req,
struct picohttpURLRoute const * const routes )
{
struct picohttpURLRoute const *r;
for(size_t i = 0; (r = routes + i)->urlhead; i++) {
size_t l;
if( (l = picohttpMatchURL(r->urlhead, req->url)) &&
req->method & r->allowed_methods ) {
req->route = r;
req->urltail = req->url[l] ? req->url+l : 0;
return 1;
}
}
return 0;
}
static int picohttpProcessRequestMethod (
struct picohttpIoOps const * const ioops )
{
int method = 0;
/* Poor man's string matching tree; trade RAM for code */
switch( picohttpIoGetch(ioops) ) {
case 'H': switch( picohttpIoGetch(ioops) ) {
case 'E': switch( picohttpIoGetch(ioops) ) {
case 'A': switch( picohttpIoGetch(ioops) ) {
case 'D':
method = PICOHTTP_METHOD_HEAD;
break;
case -1:
method = -1;
break;
} break;
case -1:
method = -1;
break;
} break;
case -1:
method = -1;
break;
} break;
case 'G': switch( picohttpIoGetch(ioops) ) {
case 'E': switch( picohttpIoGetch(ioops) ) {
case 'T':
method = PICOHTTP_METHOD_GET;
break;
case -1:
method = -1;
break;
} break;
case -1:
method = -1;
break;
} break;
case 'P': switch( picohttpIoGetch(ioops) ) {
case 'O': switch( picohttpIoGetch(ioops) ) {
case 'S': switch( picohttpIoGetch(ioops) ) {
case 'T':
method = PICOHTTP_METHOD_POST;
break;
case -1:
method = -1;
break;
} break;
case -1:
method = -1;
break;
} break;
case -1:
method = -1;
break;
} break;
case -1:
method = -1;
break;
}
return method;
}
static int picohttpProcessURL (
struct picohttpRequest * const req,
size_t const url_max_length,
int ch )
{
/* copy url up to the first query component; note that this is not
* fully compliant to RFC 3986, which permits query components in each
* path component (i.e. between '/'-s).
* picohttp terminates the path once it encounters the first query
* component.
*/
/* Deliberately discarding const qualifier! */
for(char *urliter = req->url ;; urliter++) {
if( 0 > ch ) {
return -PICOHTTP_STATUS_500_INTERNAL_SERVER_ERROR;
}
if( '?' == ch ||
picohttpIsLWS(ch) ) {
break;
}
if( '%' == ch ) {
ch = picohttpIoGetPercentCh(req->ioops);
if( ch < 0 ) {
return -PICOHTTP_STATUS_500_INTERNAL_SERVER_ERROR;
}
}
if( !ch ) {
return -PICOHTTP_STATUS_400_BAD_REQUEST;
}
if( (size_t)(urliter - req->url) >= url_max_length ) {
return -PICOHTTP_STATUS_414_REQUEST_URI_TOO_LONG;
}
*urliter = ch;
ch = picohttpIoGetch(req->ioops);
}
return ch;
}
static int picohttpProcessQuery (
struct picohttpRequest * const req,
int ch )
{
size_t var_max_length = 0;
if(req->route->get_vars) {
for(size_t j = 0; req->route->get_vars[j].name; j++) {
size_t var_length = strlen(
req->route->get_vars[j].name );
if( var_length > var_max_length ) {
var_max_length = var_length;
}
}
}
#ifdef PICOWEB_CONFIG_USE_C99VARARRAY
char var[var_max_length+1];
#else
char *var = alloca(var_max_length+1);
#endif
while('?' == ch || '&' == ch) {
memset(var, 0, var_max_length+1);
ch = picohttpIoGetch(req->ioops);
if( 0 > ch ) {
return -PICOHTTP_STATUS_500_INTERNAL_SERVER_ERROR;
}
if( '&' == ch )
continue;
for(char *variter = var ;; variter++) {
if( 0 > ch) {
return -PICOHTTP_STATUS_500_INTERNAL_SERVER_ERROR;
}
if( '=' == ch ||
'#' == ch ||
'&' == ch ||
picohttpIsLWS(ch) ) {
break;
}
if( '%' == ch ) {
ch = picohttpIoGetPercentCh(req->ioops);
if( ch < 0 ) {
return -PICOHTTP_STATUS_500_INTERNAL_SERVER_ERROR;
}
}
if( !ch ) {
return -PICOHTTP_STATUS_400_BAD_REQUEST;
}
if( (size_t)(variter - var) >= var_max_length ) {
/* variable name in request longer than longest
* variable name accepted by route --> skip to next variable */
do {
ch = picohttpIoGetch(req->ioops);
if( ch < 0 ) {
return -PICOHTTP_STATUS_500_INTERNAL_SERVER_ERROR;
}
} while(!( '&' == ch ||
picohttpIsLWS(ch) ));
continue;
}
*variter = ch;
ch = picohttpIoGetch(req->ioops);
}
if( '=' == ch ) {
debug_printf("set variable '%s'\r\n", var);
} else {
}
}
if( 0 > (ch = picohttpIoSkipSpace(req->ioops, ch)) ) {
return -PICOHTTP_STATUS_500_INTERNAL_SERVER_ERROR;
}
return ch;
}
static int picohttpProcessHTTPVersion (
struct picohttpRequest * const req,
int ch )
{
if( !picohttpIsCRLF(ch) ) {
for(uint8_t i = 0; i < 5; i++) {
if(PICOHTTP_STR_HTTP_[i] != (char)ch ) {
if( 0 > ch ) {
return -PICOHTTP_STATUS_500_INTERNAL_SERVER_ERROR;
}
return -PICOHTTP_STATUS_400_BAD_REQUEST;
}
ch = picohttpIoGetch(req->ioops);
}
req->httpversion.major = 0;
req->httpversion.minor = 0;
ch = picohttpIoB10ToU8(
&req->httpversion.major,
req->ioops,
ch );
if( 0 > ch ) {
return -PICOHTTP_STATUS_500_INTERNAL_SERVER_ERROR;
}
if( '.' != ch ) {
return -PICOHTTP_STATUS_400_BAD_REQUEST;
}
ch = picohttpIoB10ToU8(
&req->httpversion.minor,
req->ioops,
-1 );
if( 0 > ch ) {
return -PICOHTTP_STATUS_500_INTERNAL_SERVER_ERROR;
}
ch = picohttpIoSkipSpace(req->ioops, ch);
if( 0 > ch ) {
return -PICOHTTP_STATUS_500_INTERNAL_SERVER_ERROR;
}
}
ch = picohttpIoSkipOverCRLF(req->ioops, ch);
if( 0 > ch ) {
return -PICOHTTP_STATUS_500_INTERNAL_SERVER_ERROR;
}
if( !ch ) {
return -PICOHTTP_STATUS_400_BAD_REQUEST;
}
return ch;
}
static int picohttpProcessContentType(
char const **contenttype)
{
int ct = 0;
if(!strncmp(*contenttype,
PICOHTTP_STR_APPLICATION_, sizeof(PICOHTTP_STR_APPLICATION_)-1)) {
ct = PICOHTTP_CONTENTTYPE_APPLICATION;
}
if(!strncmp(*contenttype,
PICOHTTP_STR_TEXT_, sizeof(PICOHTTP_STR_TEXT_)-1)) {
ct = PICOHTTP_CONTENTTYPE_TEXT;
}
if(!strncmp(*contenttype, PICOHTTP_STR_MULTIPART_,
sizeof(PICOHTTP_STR_MULTIPART_)-1)) {
ct = PICOHTTP_CONTENTTYPE_MULTIPART;
*contenttype += sizeof(PICOHTTP_STR_MULTIPART_)-1;
if(!strncmp(*contenttype,PICOHTTP_STR_FORMDATA,
sizeof(PICOHTTP_STR_FORMDATA)-1)) {
*contenttype += sizeof(PICOHTTP_STR_FORMDATA)-1;
ct = PICOHTTP_CONTENTTYPE_MULTIPART_FORMDATA;
}
}
return ct;
}
static void picohttpProcessHeaderContentType(
struct picohttpRequest * const req,
char const *contenttype )
{
req->query.contenttype = picohttpProcessContentType(&contenttype);
if( PICOHTTP_CONTENTTYPE_MULTIPART == (req->query.contenttype & 0xf000) ) {
char *boundary = strstr(contenttype, PICOHTTP_STR_BOUNDARY);
if(boundary) {
/* see RFC1521 regarding maximum length of boundary */
memset(req->query.multipartboundary, 0,
PICOHTTP_MULTIPARTBOUNDARY_MAX_LEN+1);
memcpy(req->query.multipartboundary, "\r\n--", 4);
strncpy(req->query.multipartboundary+4,
boundary + sizeof(PICOHTTP_STR_BOUNDARY)-1,
PICOHTTP_MULTIPARTBOUNDARY_MAX_LEN);
}
}
}
static void picohttpProcessHeaderAuthorization(
struct picohttpRequest * const req,
char const *authorization )
{
if(!strncmp(authorization,
PICOHTTP_STR_BASIC_,
sizeof(PICOHTTP_STR_BASIC_)-1)) {
authorization += sizeof(PICOHTTP_STR_BASIC_)-1;
/* HTTP RFC-2617 Basic Auth */
if( !req->query.auth
|| !req->query.auth->username
|| !req->query.auth->pwresponse ) {
return;
}
size_t user_password_max_len =
req->query.auth->username_maxlen +
req->query.auth->pwresponse_maxlen;
#ifdef PICOWEB_CONFIG_USE_C99VARARRAY
char user_password[user_password_max_len+1];
#else
char *user_password = alloca(user_password_max_len+1);
#endif
char const *a = authorization;
size_t i = 0;
while(*a && i < user_password_max_len) {
phb64enc_t e = {0,0,0,0};
for(size_t j=0; *a && j < 4; j++) {
e[j] = *a++;
}
phb64raw_t r;
size_t l = phb64decode(e, r);
if( !l ) {
/* invalid chunk => abort the whole header */
return;
}
for(size_t j=0;
j < l
&& i < user_password_max_len;
j++, i++) {
user_password[i] = r[j];
}
}
user_password[i] = 0;
debug_printf(
"[picohttp] user_password='%s'\r\n",
user_password);
char *c;
for(c = user_password; *c && ':' != *c; c++);
if( !*c
|| ((size_t)(c - user_password) >= user_password_max_len)
|| ((size_t)(c - user_password) > req->query.auth->username_maxlen)
|| (strlen(c+1) > req->query.auth->pwresponse_maxlen) ) {
/* no colon found, or colon is last character in string
* or username part doesn't fit into auth.username field
*/
return;
}
memset(req->query.auth->username, 0,
req->query.auth->username_maxlen);
memset(req->query.auth->pwresponse, 0,
req->query.auth->pwresponse_maxlen);
memcpy( req->query.auth->username,
user_password,
c - user_password );
if(*(++c)) {
strncpy(req->query.auth->pwresponse,
c,
req->query.auth->pwresponse_maxlen);
}
debug_printf(
"[picohttp] Basic Auth: username='%s', password='%s'\r\n",
req->query.auth->username,
req->query.auth->pwresponse);
return;
}
if(!strncmp(authorization,
PICOHTTP_STR_DIGEST_,
sizeof(PICOHTTP_STR_DIGEST_)-1)) {
return;
}
}
static void picohttpProcessHeaderField(
void * const data,
char const *headername,
char const *headervalue)
{
struct picohttpRequest * const req = data;
debug_printf("[picohttp] %s: %s\r\n", headername, headervalue);
if(!strncmp(headername,
PICOHTTP_STR_CONTENT,
sizeof(PICOHTTP_STR_CONTENT)-1)) {
headername += sizeof(PICOHTTP_STR_CONTENT)-1;
/* Content Length */
if(!strncmp(headername,
PICOHTTP_STR__LENGTH, sizeof(PICOHTTP_STR__LENGTH)-1)) {
req->query.contentlength = atol(headervalue);
return;
}
/* Content Type */
if(!strncmp(headername,
PICOHTTP_STR__TYPE, sizeof(PICOHTTP_STR__TYPE)-1)) {
picohttpProcessHeaderContentType(req, headervalue);
return;
}
return;
}
if(!strncmp(headername,
PICOHTTP_STR_TRANSFER,
sizeof(PICOHTTP_STR_TRANSFER)-1)) {
headername += sizeof(PICOHTTP_STR_TRANSFER)-1;
/* Transfer Encoding */
if(!strncmp(headername,
PICOHTTP_STR__ENCODING, sizeof(PICOHTTP_STR__ENCODING)-1)) {
if(!strncmp(headervalue,
PICOHTTP_STR_CHUNKED,
sizeof(PICOHTTP_STR_CHUNKED)-1)) {
req->query.transferencoding = PICOHTTP_CODING_CHUNKED;
req->query.chunklength = 0;
}
return;
}
return;
}
if(!strncmp(headername,
PICOHTTP_STR_AUTHORIZATION,
sizeof(PICOHTTP_STR_AUTHORIZATION)-1)) {
picohttpProcessHeaderAuthorization(req, headervalue);
return;
}
}
static int picohttpProcessHeaders (
struct picohttpRequest * const req,
size_t const headervalue_maxlen,
char * const headervalue,
picohttpHeaderFieldCallback headerfieldcallback,
void * const cb_data,
int ch )
{
#define PICOHTTP_HEADERNAME_MAX_LEN 32
char headername[PICOHTTP_HEADERNAME_MAX_LEN+1] = {0,};
#if 0
#define PICOHTTP_HEADERVALUE_MAX_LEN 224
char headervalue[PICOHTTP_HEADERVALUE_MAX_LEN+1] = {0,};
#endif
char *hn = headername;
char *hv = headervalue;
/* TODO: Add Header handling here */
while( !picohttpIsCRLF(ch) ) {
/* Beginning of new header line */
if( 0 < ch && !picohttpIsCRLF(ch) ){
/* new header field OR field continuation */
if( picohttpIsLWS(ch) ) {
/* continuation */
/* skip space */
if( 0 > (ch = picohttpIoSkipSpace(req->ioops, ch)) )
return -PICOHTTP_STATUS_500_INTERNAL_SERVER_ERROR;
/* read until EOL */
for(;
0 < ch && !picohttpIsCRLF(ch);
hv = (size_t)(hv - headervalue) <
(headervalue_maxlen-1) ?
hv+1 : 0 ) {
/* add to header field content */
if(hv)
*hv = ch;
ch = picohttpIoGetch(req->ioops);
}
} else {
if( *headername && *headervalue && headerfieldcallback )
headerfieldcallback(
cb_data,
headername,
headervalue );
/* new header field */