write.c
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#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "class.h"
#include "interface/class.h"
#include "http/message.h"
#include "http/response.h"
#include "http/response/writer.h"
#define MAX(x,y) ((x) > (y) ? (x) : (y))
#define _PSIZE(x) (MAX((x),RESPONSE_WRITER_MAX_BUF))
#define PSIZE _PSIZE(this->nheader+message->nbody)
ssize_t
httpResponseWriterWrite(HttpResponseWriter this, int fd)
{
HttpMessageQueue respq = this->response_queue;
HttpMessage message = (HttpMessage)this->cur_response;
ssize_t processed = (message)? 1 : 0;
int cont = 1;
while (cont) {
switch (this->state) {
case HTTP_RESPONSE_GET:
if (NULL == this->cur_response && 0 < respq->nmsgs) {
message = respq->msgs[0];
this->cur_response = (HttpResponse)message;
processed++;
memmove(respq->msgs,
&(respq->msgs[1]),
sizeof(void*) * (--respq->nmsgs + 1));
this->nbuffer = 0;
this->written = 0;
this->pstart = 0;
this->nheader = httpMessageHeaderSizeGet(message);
this->pend = this->nheader;
this->pipe = malloc(PSIZE);
httpMessageHeaderToString(message, this->pipe);
this->state = HTTP_RESPONSE_WRITE;
}
else {
cont = 0;
}
break;
case HTTP_RESPONSE_WRITE:
/**
* read
*/
if (this->nbuffer < message->nbody) {
size_t temp = 0;
size_t rsize;
this->pend = (PSIZE == this->pend)?
0 : this->pend;
rsize = (this->pstart <= this->pend)?
PSIZE - this->pend :
this->pstart - 1;
switch (message->type) {
case HTTP_MESSAGE_BUFFERED:
temp = message->nbody - this->nbuffer;
temp = (rsize<temp)? rsize : temp;
memcpy(
&(this->pipe[this->pend]),
&(message->body[this->nbuffer]),
temp);
break;
case HTTP_MESSAGE_PIPED:
temp = read(
message->handle,
&(this->pipe[this->pend]),
rsize);
break;
}
this->nbuffer += temp;
this->pend += temp;
}
/**
* write
*/
{
size_t wsize;
size_t temp;
wsize = (this->pstart <= this->pend)?
this->pend - this->pstart :
PSIZE - this->pstart;
temp = write(fd, &(this->pipe[this->pstart]), wsize);
this->written += temp;
this->pstart += temp;
this->pstart = (PSIZE == this->pstart)?
0 : this->pstart;
}
if (this->written == message->nbody + this->nheader) {
this->state = HTTP_RESPONSE_DONE;
}
else {
cont = 0;
}
break;
case HTTP_RESPONSE_DONE:
if (HTTP_MESSAGE_PIPED == message->type) {
close(message->handle);
}
free(this->pipe);
this->nheader = 0;
this->nbuffer = 0;
this->written = 0;
this->pstart = 0;
this->pend = 0;
if (! httpMessageHasKeepAlive(message)) {
/**
* if the message did not have the keep-alive feature
* we don't care about further pipelined messages and
* return the to caller with a 0 indicating that the
* underlying connection should be closed.
*/
processed = 0;
cont = 0;
}
delete(&this->cur_response);
this->state = HTTP_RESPONSE_GET;
break;
}
}
return processed;
}
// vim: set ts=4 sw=4: