/
parser.c
194 lines (176 loc) · 4.7 KB
/
parser.c
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#include "parser.h"
int Parser(clientSock *client,requestLine *argu)
{
char cmpletReq[BUF_SIZE];
if(bufParse(client,argu,cmpletReq)==1)
{
if( (cmpletReq != NULL) && argu->status != 411) {
httpParser(cmpletReq,argu);
}
return 1;
}
else{
return 0;
}
}
static int BadRq(requestLine *argu, char *key)
{
char *headerSet[] = {
"Content-Length:",
"Content-Type:",
"Last-Modifed:",
"Connection:",
"Date:",
"Host:",
"User-Agent:",
"Accept:",
"Accept-Language:",
"Accept-Encoding:",
"Cache-Control:",
"Accept-Encoding:"
};
int n = 12;
int i;
// printf("key: %s\n", key);
for(i = 0; i < n; i ++)
{
// printf("headerset :: %s\n", headerSet[i]);
if(!strcmp(headerSet[i],key))
{
return 1;
}
}
return 0;
}
int httpParser(char *buf, requestLine *argu)
{
int lineSize;
char *temp;
char *currPtr;
if(!(currPtr = strstr(buf,"\r\n")))
{
argu->status = 500;
return 0;
}
if((lineSize = strlen(buf)-strlen(currPtr))<=0)
{
argu->status = 500;
return 0;
}
if(!(temp = malloc(lineSize+1)))
{
argu->status = 500;
return 0;
}
char *t = strncpy(temp,buf,lineSize);
t[lineSize] = 0;
httpLineParser(temp,lineSize, argu);
if(!temp)
{
free(temp);
}
char *leftLine;
int length = strlen(currPtr)-2;
leftLine = (char *)malloc(length+1);
strncpy(leftLine,currPtr+2,length);
leftLine[length]='\0';
char *pch;
pch = strtok(leftLine,"\n");
printf("req->status: %d\n",argu->status);
printf("leftLine:: %s\n",leftLine );
while(pch != NULL)
{
char key[20];
char value[40];
sscanf(pch,"%s %s",key,value);
if(0 == BadRq(argu,key))
{
argu->status = 400;
}
if(strcmp(key,"Content-Type:")==0)
{
strcpy(argu->contentType,value);
}else if(strcmp(key,"Content-Length:")==0)
{
argu->contentLength = atoi(value);
}
else if(strcmp(key,"Connection:")==0)
{
strcpy(argu->connect,value);
}
pch = strtok(NULL,"\n");
}
free(leftLine);
printf("req->status: %d\n",argu->status);
return 1;
}
int bufParse(clientSock *client, requestLine *req, char *cmpletReq)
{
printf("buf parse\n");
if(strcmp(client->buf,"\r\n") == 0) /* Request is not a complete request */
{
memset(client->buf,0,BUF_SIZE);
client->alreadyRead=0;
return 0;
}
char *temp = strstr(client->buf,"\r\n\r\n");
if(temp)
{
int lenReq = strlen(client->buf)-strlen(temp);
if(lenReq > 8182) /* Request length exceeds the limitation 8192 */
{
printf("long request line\n");
memset(client->buf, 0, BUF_SIZE);
req->status = 411;
}
else /* Normal request */
{
assert(req->status == 200 && "status must be 200");
char *end = strncpy(cmpletReq, client->buf, lenReq+2);
end[lenReq+2] = 0; /* null terminate */
client->alreadyRead = 0;
memset(client->buf, 0, BUF_SIZE);
}
return 1;
} else{
req->status = 400;
}
return 0;
}
void httpLineParser(char *temp, int lens, requestLine *argu){
printf("temp :: %s\n", temp);
sscanf(temp,"%s %s %s", argu->method, argu->uri, argu->version);
printf("line parser result: %s, %s, %s\n", argu->method, argu->uri, argu->version);
parseUri(argu);
}
void parseUri(requestLine *argu){
int tmpNum=0;
int *tmpPort=NULL;
if (strstr(argu->uri, "http://")) {
if (sscanf(argu->uri, "http://%8192[^:]:%i/%8192[^\n]", argu->host, tmpPort, argu->relativePath) == 3)
{
tmpNum = 1;
}else if (sscanf(argu->uri, "http://%8192[^/]/%8192[^\n]", argu->host, argu->relativePath) == 2)
{
tmpNum = 2;
}else if (sscanf(argu->uri, "http://%8192[^:]:%i[^\n]", argu->host, tmpPort) == 2)
{
tmpNum = 3;
}else if (sscanf(argu->uri, "http://%8192[^/]", argu->host) == 1)
{
tmpNum = 4;
}
}
else if (!strstr(argu->uri, "/")) {
sprintf(argu->relativePath, "/");
}
else {
strcpy(argu->relativePath, argu->uri);
}
if (tmpNum == 4) {
sprintf(argu->relativePath, "/index.html");
}
else if (!strcmp(argu->relativePath, "/")) {
strcat(argu->relativePath, "index.html");
}
}