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Downloading stuff works properly now.

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Alcaro 2015-01-23 00:10:56 +01:00
parent 8dafb7c110
commit e3c6d8286b
1 changed files with 150 additions and 36 deletions
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186
http-new.c
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@ -31,11 +31,17 @@ void http_delete(struct http* state);
#include<stdio.h>
int main()
{
struct http* http1=http_new("http://floating.muncher.se:22/");
struct http* http2=http_new("http://floating.muncher.se/sepulcher/");
while (!http_poll(http2, NULL, NULL)) {}
while (!http_poll(http1, NULL, NULL)) {}
printf("%i %i %p %s\n",http_status(http1),http_status(http2),(char*)http_data(http1, NULL, false),http_data(http2, NULL, true));
struct http* http3=http_new("http://www.wikipedia.org/");
while (!http_poll(http3, NULL, NULL)) {}
//struct http* http1=http_new("http://floating.muncher.se:22/");
//struct http* http2=http_new("http://floating.muncher.se/sepulcher/");
//struct http* http3=http_new("http://www.wikipedia.org/");
//while (!http_poll(http3, NULL, NULL)) {}
//while (!http_poll(http2, NULL, NULL)) {}
//while (!http_poll(http1, NULL, NULL)) {}
//printf("%i %i %i %p %s %s\n",
//http_status(http1),http_status(http2),http_status(http3),
//(char*)http_data(http1, NULL, false),http_data(http2, NULL, true),http_data(http3, NULL, true));
}
////////////////////////////////
//http.c
@ -201,6 +207,7 @@ struct http* http_new(const char * url)
error=false;
//this is a bit lazy, but it works
http_send_str(fd, &error, "GET /");
http_send_str(fd, &error, location);
http_send_str(fd, &error, " HTTP/1.1\r\n");
@ -242,64 +249,171 @@ int http_fd(struct http* state)
bool http_poll(struct http* state, size_t* progress, size_t* total)
{
enum { p_header_top, p_header, p_body };
//TODO: these variables belong in struct http - they're here for now because that's easier.
enum { p_header_top, p_header, p_body, p_body_chunklen, p_done, p_error };
enum { t_full, t_len, t_chunk };
#define MAX_HEADER_LEN 512
char header[MAX_HEADER_LEN];
size_t headerpos=0;
char part = p_header_top;
char bodytype = t_full;
bool error=false;
size_t pos=0;
size_t len=0;
size_t buflen=512;
char * data=malloc(buflen);
//end of struct http
while (part != p_body)
ssize_t newlen;
again:
newlen=0;
if (part < p_body)
{
//ssize_t newlen=http_recv(state->fd, &error, header+headerpos, MAX_HEADER_LEN-headerpos);
ssize_t newlen=http_recv(state->fd, &error, header+headerpos, 1);
//newlen=http_recv(state->fd, &error, data+pos, buflen-pos);
newlen=http_recv(state->fd, &error, data+pos, 1);
if (newlen<0) goto fail;
if (headerpos+newlen>=MAX_HEADER_LEN) goto fail;
headerpos+=newlen;
char * dataend=header+headerpos;
while (true)
if (newlen==0) goto again;
if (pos+newlen >= buflen-64)
{
char * lineend=memchr(header+headerpos-newlen, '\n', newlen);
buflen*=2;
data=realloc(data, buflen);
}
pos+=newlen;
while (part < p_body)
{
char * dataend=data+pos;
//printf("%li\n",pos);
char * lineend=memchr(data, '\n', pos);
//printf("%i '%s'\n",pos,data);
if (!lineend) break;
*lineend='\0';
if (lineend!=header && lineend[-1]=='\r') lineend[-1]='\0';
if (lineend!=data && lineend[-1]=='\r') lineend[-1]='\0';
//puts(data);
if (part==p_header_top)
{
if (strncmp(header, "HTTP/1.", strlen("HTTP/1."))!=0) goto fail;
state->status=strtoul(header+strlen("HTTP/1.1 "), NULL, 10);
if (strncmp(data, "HTTP/1.", strlen("HTTP/1."))!=0) goto fail;
state->status=strtoul(data+strlen("HTTP/1.1 "), NULL, 10);
part=p_header;
}
else
{
if (*header=='\0')
if (!strncmp(data, "Content-Length: ", strlen("Content-Length: ")))
{
bodytype=t_len;
len=strtol(data+strlen("Content-Length: "), NULL, 10);
}
if (!strcmp(data, "Transfer-Encoding: chunked"))
{
bodytype=t_chunk;
}
//TODO: save headers somewhere
if (*data=='\0')
{
part=p_body;
if (bodytype==t_chunk) part=p_body_chunklen;
}
if (!strncmp(header, "Content-Length: ", strlen("Content-Length: ")))
{
}
if (!strcmp(header, "Transfer-Encoding: chunked"))
{
}
printf("//%s//\n",header);
}
memmove(header, lineend+1, dataend-(lineend+1));
headerpos-=(lineend+1-header);
memmove(data, lineend+1, dataend-(lineend+1));
pos=(dataend-(lineend+1));
//printf("[%s] %li\n",data,pos);
}
if (part>=p_body)
{
newlen=pos;
pos=0;
}
}
//while (true)
//{
//
//}
if (part >= p_body && part < p_done)
{
//printf("%li/%li %.*s\n",pos,len,pos,data);
if (!newlen)
{
//newlen=http_recv(state->fd, &error, data+pos, buflen-pos);
newlen=http_recv(state->fd, &error, data+pos, 1);
if (newlen<0)
{
if (bodytype==t_full) part=p_done;
else goto fail;
newlen=0;
}
if (newlen==0) goto again;
//printf("%lu+%lu >= %lu-64\n",pos,newlen,buflen);
if (pos+newlen >= buflen-64)
{
buflen*=2;
data=realloc(data, buflen);
}
}
parse_again:
if (bodytype==t_chunk)
{
if (part==p_body_chunklen)
{
pos+=newlen;
if (pos-len >= 2)
{
//len=start of chunk including \r\n
//pos=end of data
char * fullend=data+pos;
char * end=memchr(data+len+2, '\n', pos-len-2);
if (end)
{
size_t chunklen=strtoul(data+len, NULL, 16);
pos=len;
end++;
memmove(data+len, end, fullend-end);
len=chunklen;
newlen=(fullend-end);
//len=num bytes
//newlen=unparsed bytes after \n
//pos=start of chunk including \r\n
part=p_body;
if (len==0)
{
part=p_done;
len=pos;
}
goto parse_again;
}
}
}
else if (part==p_body)
{
if (newlen >= len)
{
pos+=len;
newlen-=len;
len=pos;
part=p_body_chunklen;
goto parse_again;
}
else
{
pos+=newlen;
len-=newlen;
}
}
}
else
{
pos+=newlen;
if (pos==len) part=p_done;
if (pos>len) goto fail;
}
}
if (part==p_done)
{
data[len]='\0';
puts(data);
return true;
}
else goto again;
fail:
puts("ERR");
part=p_error;
return true;
}