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289 lines
7.2 KiB
C
289 lines
7.2 KiB
C
#include "socket.h"
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#include "io.h"
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#include "buffer.h"
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#include "ip6.h"
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#include "array.h"
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#include "case.h"
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#include "fmt.h"
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#include "iob.h"
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#include "str.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <errno.h>
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static void carp(const char* routine) {
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buffer_puts(buffer_2,routine);
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buffer_puts(buffer_2,": ");
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buffer_puterror(buffer_2);
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buffer_putnlflush(buffer_2);
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}
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static void panic(const char* routine) {
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carp(routine);
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exit(111);
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}
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struct http_data {
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array r;
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io_batch iob;
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char* hdrbuf;
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int hlen;
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int keepalive;
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};
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int header_complete(struct http_data* r) {
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long i;
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long l=array_bytes(&r->r);
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const char* c=array_start(&r->r);
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for (i=0; i+1<l; ++i) {
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if (c[i]=='\n' && c[i+1]=='\n')
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return i+2;
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if (i+3<l &&
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c[i]=='\r' && c[i+1]=='\n' &&
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c[i+2]=='\r' && c[i+3]=='\n')
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return i+4;
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}
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return 0;
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}
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void httperror(struct http_data* r,const char* title,const char* message) {
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char* c;
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c=r->hdrbuf=(char*)malloc(strlen(message)+strlen(title)+200);
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if (!c) {
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r->hdrbuf="HTTP/1.0 500 internal error\r\nContent-Type: text/plain\r\nConnection: close\r\n\r\nout of memory\n";
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r->hlen=strlen(r->hdrbuf);
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} else {
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c+=fmt_str(c,"HTTP/1.0 ");
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c+=fmt_str(c,title);
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c+=fmt_str(c,"\r\nContent-Type: text/html\r\nConnection: ");
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c+=fmt_str(c,r->keepalive?"keep-alive":"close");
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c+=fmt_str(c,"\r\nContent-Length: ");
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c+=fmt_ulong(c,strlen(message)+strlen(title)+16-4);
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c+=fmt_str(c,"\r\n\r\n<title>");
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c+=fmt_str(c,title+4);
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c+=fmt_str(c,"</title>\n");
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r->hlen=c - r->hdrbuf;
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}
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iob_addbuf(&r->iob,r->hdrbuf,r->hlen);
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}
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static struct mimeentry { const char* name, *type; } mimetab[] = {
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{ "html", "text/html" },
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{ "css", "text/css" },
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{ "dvi", "application/x-dvi" },
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{ "ps", "application/postscript" },
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{ "pdf", "application/pdf" },
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{ "gif", "image/gif" },
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{ "png", "image/png" },
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{ "jpeg", "image/jpeg" },
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{ "jpg", "image/jpeg" },
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{ "mpeg", "video/mpeg" },
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{ "mpg", "video/mpeg" },
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{ "avi", "video/x-msvideo" },
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{ "mov", "video/quicktime" },
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{ "qt", "video/quicktime" },
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{ "mp3", "audio/mpeg" },
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{ "ogg", "audio/x-oggvorbis" },
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{ "wav", "audio/x-wav" },
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{ "pac", "application/x-ns-proxy-autoconfig" },
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{ "sig", "application/pgp-signature" },
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{ "torrent", "application/x-bittorrent" },
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{ "class", "application/octet-stream" },
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{ "js", "application/x-javascript" },
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{ "tar", "application/x-tar" },
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{ "zip", "application/zip" },
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{ "dtd", "text/xml" },
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{ "xml", "text/xml" },
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{ "xbm", "image/x-xbitmap" },
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{ "xpm", "image/x-xpixmap" },
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{ "xwd", "image/x-xwindowdump" },
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{ 0,0 } };
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const char* mimetype(const char* filename) {
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int i,e=str_rchr(filename,'.');
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if (filename[e]==0) return "text/plain";
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++e;
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for (i=0; mimetab[i].name; ++i)
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if (str_equal(mimetab[i].name,filename+e))
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return mimetab[i].type;
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return "application/octet-stream";
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}
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const char* http_header(struct http_data* r,const char* h) {
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long i;
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long l=array_bytes(&r->r);
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long sl=strlen(h);
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const char* c=array_start(&r->r);
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for (i=0; i+sl+2<l; ++i)
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if (c[i]=='\n' && case_equalb(c+i+1,sl,h) && c[i+sl+1]==':') {
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c+=i+sl+1;
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if (*c==' ' || *c=='\t') ++c;
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return c;
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}
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return 0;
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}
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void httpresponse(struct http_data* h,int64 s) {
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char* c;
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const char* m;
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array_cat0(&h->r);
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c=array_start(&h->r);
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if (byte_diff(c,4,"GET ")) {
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e400:
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httperror(h,"400 Invalid Request","This server only understands GET.");
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} else {
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char *d;
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int64 fd;
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struct stat s;
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c+=4;
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for (d=c; *d!=' '&&*d!='\t'&&*d!='\n'&&*d!='\r'; ++d) ;
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if (*d!=' ') goto e400;
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*d=0;
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if (c[0]!='/') goto e404;
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while (c[1]=='/') ++c;
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if (!io_readfile(&fd,c+1)) {
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e404:
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httperror(h,"404 Not Found","No such file or directory.");
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} else {
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if (fstat(fd,&s)==-1) {
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io_close(fd);
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goto e404;
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}
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if ((m=http_header(h,"Connection"))) {
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if (str_equal(m,"keep-alive"))
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h->keepalive=1;
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else
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h->keepalive=0;
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} else {
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if (byte_equal(d+1,8,"HTTP/1.0"))
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h->keepalive=0;
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else
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h->keepalive=1;
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}
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m=mimetype(c);
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c=h->hdrbuf=(char*)malloc(500);
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c+=fmt_str(c,"HTTP/1.1 Coming Up\r\nContent-Type: ");
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c+=fmt_str(c,m);
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c+=fmt_str(c,"\r\nContent-Length: ");
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c+=fmt_ulonglong(c,s.st_size);
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c+=fmt_str(c,"\r\nLast-Modified: ");
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c+=fmt_httpdate(c,s.st_mtime);
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c+=fmt_str(c,"\r\nConnection: ");
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c+=fmt_str(c,h->keepalive?"keep-alive":"close");
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c+=fmt_str(c,"\r\n\r\n");
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iob_addbuf(&h->iob,h->hdrbuf,c - h->hdrbuf);
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iob_addfile(&h->iob,fd,0,s.st_size);
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}
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}
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io_dontwantread(s);
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io_wantwrite(s);
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}
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int main() {
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int s=socket_tcp6b();
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uint32 scope_id;
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char ip[16];
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uint16 port;
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if (socket_bind6_reuse(s,V6any,8000,0)==-1)
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panic("socket_bind6_reuse");
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if (socket_listen(s,16)==-1)
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panic("socket_listen");
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if (!io_fd(s))
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panic("io_fd");
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io_wantread(s);
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for (;;) {
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int64 i;
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io_wait();
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while ((i=io_canread())!=-1) {
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if (i==s) {
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int n;
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while ((n=socket_accept6(s,ip,&port,&scope_id))!=-1) {
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char buf[IP6_FMT];
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buffer_puts(buffer_2,"accepted new connection from ");
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buffer_put(buffer_2,buf,fmt_ip6(buf,ip));
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buffer_puts(buffer_2,":");
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buffer_putulong(buffer_2,port);
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buffer_puts(buffer_2," (fd ");
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buffer_putulong(buffer_2,n);
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buffer_puts(buffer_2,")");
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if (io_fd(n)) {
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struct http_data* h=(struct http_data*)malloc(sizeof(struct http_data));
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io_wantread(n);
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if (h) {
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byte_zero(h,sizeof(struct http_data));
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io_setcookie(n,h);
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} else
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io_close(n);
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} else {
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buffer_puts(buffer_2,", but io_fd failed.");
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io_close(n);
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}
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buffer_putnlflush(buffer_2);
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}
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if (errno==EAGAIN)
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io_eagain(s);
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else
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carp("socket_accept6");
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} else {
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char buf[8192];
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struct http_data* h=io_getcookie(i);
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int l=io_tryread(i,buf,sizeof buf);
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if (l==-3) {
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if (h) {
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array_reset(&h->r);
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iob_reset(&h->iob);
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free(h->hdrbuf); h->hdrbuf=0;
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}
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buffer_puts(buffer_2,"io_tryread(");
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buffer_putulong(buffer_2,i);
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buffer_puts(buffer_2,"): ");
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buffer_puterror(buffer_2);
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buffer_putnlflush(buffer_2);
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io_close(i);
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} else if (l==0) {
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if (h) {
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array_reset(&h->r);
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iob_reset(&h->iob);
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free(h->hdrbuf); h->hdrbuf=0;
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}
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buffer_puts(buffer_2,"eof on fd #");
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buffer_putulong(buffer_2,i);
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buffer_putnlflush(buffer_2);
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io_close(i);
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} else if (l>0) {
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array_catb(&h->r,buf,l);
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if (array_failed(&h->r)) {
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httperror(h,"500 Server Error","request too long.");
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emerge:
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io_dontwantread(i);
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io_wantwrite(i);
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} else if (array_bytes(&h->r)>8192) {
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httperror(h,"500 request too long","You sent too much headers");
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goto emerge;
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} else if ((l=header_complete(h)))
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httpresponse(h,i);
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}
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}
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}
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while ((i=io_canwrite())!=-1) {
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struct http_data* h=io_getcookie(i);
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int64 r=iob_send(i,&h->iob);
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/* printf("iob_send returned %lld\n",r); */
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if (r==-1) io_eagain(i); else
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if (r<=0) {
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array_trunc(&h->r);
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iob_reset(&h->iob);
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free(h->hdrbuf); h->hdrbuf=0;
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if (h->keepalive) {
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io_dontwantwrite(i);
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io_wantread(i);
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} else
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io_close(i);
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}
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}
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}
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return 0;
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}
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