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http_parse.c
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#include "http.h"
int han_http_parse_request_line(han_http_request_t *request){
enum{
sw_start = 0,
sw_method,
sw_spaces_before_uri,
sw_after_slash_in_uri,
sw_http,
sw_http_H,
sw_http_HT,
sw_http_HTT,
sw_http_HTTP,
sw_first_major_digit,
sw_major_digit,
sw_first_minor_digit,
sw_minor_digit,
sw_spaces_after_digit,
sw_almost_done
}state;
state = request->state;
u_char ch, *p, *m;
size_t pi;
for(pi = request->pos; pi < request->last; pi++){
p = (u_char *)&request->buff[pi % MAX_BUF];
ch = *p;
switch(state){
case sw_start:
request->request_start = p;
if(ch == CR || ch == LF)
break;
if((ch < 'A' || ch > 'Z') && ch != '_')
return han_HTTP_PARSE_INVALID_METHOD;
state = sw_method;
break;
case sw_method:
if(ch == ' '){
request->method_end = p;
m = request->request_start;
switch(p - m){
case 3:
if(han_str3_cmp(m, 'G', 'E', 'T', ' ')){
request->method = han_HTTP_GET;
break;
}
break;
case 4:
if(han_str3Ocmp(m, 'P', 'O', 'S', 'T')){
request->method = han_HTTP_POST;
break;
}
if(han_str4cmp(m, 'H', 'E', 'A', 'D')){
request->method = han_HTTP_HEAD;
break;
}
break;
default:
request->method = han_HTTP_UNKNOWN;
break;
}
state = sw_spaces_before_uri;
break;
}
if((ch < 'A' || ch > 'Z') && ch != '_')
return han_HTTP_PARSE_INVALID_METHOD;
break;
case sw_spaces_before_uri:
if(ch == '/'){
request->uri_start = p + 1;
state = sw_after_slash_in_uri;
break;
}
switch(ch){
case ' ':
break;
default:
return han_HTTP_PARSE_INVALID_REQUEST;
}
break;
case sw_after_slash_in_uri:
switch(ch){
case ' ':
request->uri_end = p;
state = sw_http;
break;
default:
break;
}
break;
case sw_http:
switch(ch){
case ' ':
break;
case 'H':
state = sw_http_H;
break;
default:
return han_HTTP_PARSE_INVALID_REQUEST;
}
break;
case sw_http_H:
switch(ch){
case 'T':
state = sw_http_HT;
break;
default:
return han_HTTP_PARSE_INVALID_REQUEST;
}
break;
case sw_http_HT:
switch(ch){
case 'T':
state = sw_http_HTT;
break;
default:
return han_HTTP_PARSE_INVALID_REQUEST;
}
break;
case sw_http_HTT:
switch(ch){
case 'P':
state = sw_http_HTTP;
break;
default:
return han_HTTP_PARSE_INVALID_REQUEST;
}
break;
case sw_http_HTTP:
switch(ch){
case '/':
state = sw_first_major_digit;
break;
default:
return han_HTTP_PARSE_INVALID_REQUEST;
}
break;
case sw_first_major_digit:
if(ch < '1' || ch > '9')
return han_HTTP_PARSE_INVALID_REQUEST;
request->http_major = ch - '0';
state = sw_major_digit;
break;
case sw_major_digit:
if(ch == '.'){
state = sw_first_minor_digit;
break;
}
if(ch < '0' || ch > '9')
return han_HTTP_PARSE_INVALID_REQUEST;
request->http_major = request->http_major * 10 + ch - '0';
break;
case sw_first_minor_digit:
if(ch < '0' || ch > '9')
return han_HTTP_PARSE_INVALID_REQUEST;
request->http_minor = ch - '0';
state = sw_minor_digit;
break;
case sw_minor_digit:
if(ch == CR){
state = sw_almost_done;
break;
}
if(ch == LF)
goto done;
if(ch == ' '){
state = sw_spaces_after_digit;
break;
}
if(ch < '0' || ch > '9')
return han_HTTP_PARSE_INVALID_REQUEST;
request->http_minor = request->http_minor * 10 + ch - '0';
break;
case sw_spaces_after_digit:
switch(ch){
case ' ':
break;
case CR:
state = sw_almost_done;
break;
case LF:
goto done;
default:
return han_HTTP_PARSE_INVALID_REQUEST;
}
break;
case sw_almost_done:
request->request_end = p - 1;
switch(ch){
case LF:
goto done;
default:
return han_HTTP_PARSE_INVALID_REQUEST;
}
}
}
request->pos = pi;
request->state = state;
return han_AGAIN;
done:
request->pos = pi + 1;
if (request->request_end == NULL)
request->request_end = p;
request->state = sw_start;
return 0;
}
int han_http_parse_request_body(han_http_request_t *request){
// 状态列表
enum{
sw_start = 0,
sw_key,
sw_spaces_before_colon,
sw_spaces_after_colon,
sw_value,
sw_cr,
sw_crlf,
sw_crlfcr
}state;
state = request->state;
size_t pi;
unsigned char ch, *p;
han_http_header_t *hd;
for (pi = request->pos; pi < request->last; pi++) {
p = (unsigned char*)&request->buff[pi % MAX_BUF];
ch = *p;
switch(state){
case sw_start:
if(ch == CR || ch == LF)
break;
request->cur_header_key_start = p;
state = sw_key;
break;
case sw_key:
if(ch == ' '){
request->cur_header_key_end = p;
state = sw_spaces_before_colon;
break;
}
if(ch == ':'){
request->cur_header_key_end = p;
state = sw_spaces_after_colon;
break;
}
break;
case sw_spaces_before_colon:
if(ch == ' ')
break;
else if(ch == ':'){
state = sw_spaces_after_colon;
break;
}
else
return han_HTTP_PARSE_INVALID_HEADER;
case sw_spaces_after_colon:
if (ch == ' ')
break;
state = sw_value;
request->cur_header_value_start = p;
break;
case sw_value:
if(ch == CR){
request->cur_header_value_end = p;
state = sw_cr;
}
if(ch == LF){
request->cur_header_value_end = p;
state = sw_crlf;
}
break;
case sw_cr:
if(ch == LF){
state = sw_crlf;
hd = (han_http_header_t *) malloc(sizeof(han_http_header_t));
hd->key_start = request->cur_header_key_start;
hd->key_end = request->cur_header_key_end;
hd->value_start = request->cur_header_value_start;
hd->value_end = request->cur_header_value_end;
list_add(&(hd->list), &(request->list));
break;
}
else
return han_HTTP_PARSE_INVALID_HEADER;
case sw_crlf:
if(ch == CR)
state = sw_crlfcr;
else{
request->cur_header_key_start = p;
state = sw_key;
}
break;
case sw_crlfcr:
switch(ch){
case LF:
goto done;
default:
return han_HTTP_PARSE_INVALID_HEADER;
}
}
}
request->pos = pi;
request->state = state;
return han_AGAIN;
done:
request->pos = pi + 1;
request->state = sw_start;
return 0;
}