void decideAboutHowToHandleRequestedResource
(
struct AmmServer_Instance * instance,
struct HTTPTransaction * transaction,
char * servefile,
int * resource_is_a_directory,
int * resource_is_a_file ,
int * resource_is_a_template ,
int * generate_directory_list
)
{
*resource_is_a_template=0;
// STEP 0 : Is the resource an obvious directory , or obvious file ? Check for it..!
if ( isResourceADirectory(transaction->incomingHeader.resource , strlen(transaction->incomingHeader.resource) ) )
{
*resource_is_a_directory=1;
}
strncpy(servefile,transaction->incomingHeader.verified_local_resource,MAX_FILE_PATH);
//servefile variable now contains just the verified_local_resource as generated by http_header_analysis.c
//we have checked transaction->incomingHeader.verified_local_resource for .. , weird ascii characters etc, so it should be safe for usage from now on..!
//There are some virtual files we want to re-route to their real path..!
if (cache_ChangeRequestIfTemplateRequested(instance,servefile,MAX_FILE_PATH/*,instance->templates_root*/) )
{ //Skip disk access times for checking for directories and other stuff..!
//We know that the resource is a file from our cache indexes..!
*resource_is_a_directory=0;
*resource_is_a_file=1;
*resource_is_a_template=1;
}
//STEP 0 : Check with cache!
if (cache_ResourceExists(instance,servefile,&transaction->resourceCacheID) )
{ //Skip disk access times for checking for directories and other stuff..!
//We know that the resource is a file from our cache indexes..!
//Bonus points we now have the index id of the cached instance of the file for future use..
*resource_is_a_directory=0;
*resource_is_a_file=1;
} else
{//Start of file not in cache scenario
// STEP 1 : If we can't obviously determine if the request is a directory , lets check on disk to find out if it is a directory after all..!
if (!*resource_is_a_directory)
{
if (DirectoryExistsAmmServ(servefile))
{
*resource_is_a_directory=1;
//If the resource had an / in the string end we would have already come to the conclusion that this was a directory
// so lets append the slash now on the request to help the code that follows work as intended
strcat(transaction->incomingHeader.resource,"/");
strcat(servefile,"/");
fprintf(stderr,"TODO: this path is a little problematic because the web browser on the client will think\n");
fprintf(stderr,"that we are on the / directory , a location field in the response header will clarify things\n");
}
}
// STEP 2 : If we are sure that we dont have a directory then we have to find out accessing disk , could it be that our client wants a file ?
if ( (!*resource_is_a_directory) && (FileExistsAmmServ(servefile)) )
{
*resource_is_a_file=1;
}
// STEP 3 : If after these steps the resource turned out to be a directory , we cant serve raw directories , so we will either look for an index.html
// and if an index file cannot be found we will generate a directory list and send that instead..!
if (*resource_is_a_directory)
{
// *resource_is_a_directory means we got something like directory1/directory2/ so we should check for index file at the path given..!
if ( FindIndexFile(instance,instance->webserver_root,transaction->incomingHeader.resource,servefile,MAX_FILE_PATH) )
{
/*servefile should contain a valid index file ,
lets make it look like it was a file we wanted all along :P! */
*resource_is_a_directory=0;
*resource_is_a_file=1;
} else
{
*generate_directory_list=1;
}
}
} //End of file not in cache scenario
}
int AmmServer_DirectoryExists(const char * filename)
{
return DirectoryExistsAmmServ(filename);
}
