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- /*
- ** JNetLib
- ** Copyright (C) 2000-2001 Nullsoft, Inc.
- ** Author: Justin Frankel
- ** File: httpget.cpp - JNL HTTP GET implementation
- ** License: see jnetlib.h
- */
-
- #include "netinc.h"
- #include "util.h"
- #include "httpget.h"
-
-
- JNL_HTTPGet::JNL_HTTPGet(JNL_AsyncDNS *dns, int recvbufsize, char *proxy)
- {
- m_recvbufsize=recvbufsize;
- m_dns=dns;
- m_con=NULL;
- m_http_proxylpinfo=0;
- m_http_proxyhost=0;
- m_http_proxyport=0;
- if (proxy && *proxy)
- {
- char *p=(char*)malloc(strlen(proxy)+1);
- if (p)
- {
- char *r=NULL;
- strcpy(p,proxy);
- do_parse_url(p,&m_http_proxyhost,&m_http_proxyport,&r,&m_http_proxylpinfo);
- free(r);
- free(p);
- }
- }
- m_sendheaders=NULL;
- reinit();
- }
-
- void JNL_HTTPGet::reinit()
- {
- m_errstr=0;
- m_recvheaders=NULL;
- m_recvheaders_size=0;
- m_http_state=0;
- m_http_port=0;
- m_http_url=0;
- m_reply=0;
- m_http_host=m_http_lpinfo=m_http_request=NULL;
- }
-
- void JNL_HTTPGet::deinit()
- {
- delete m_con;
- free(m_recvheaders);
-
- free(m_http_url);
- free(m_http_host);
- free(m_http_lpinfo);
- free(m_http_request);
- free(m_errstr);
- free(m_reply);
- reinit();
- }
-
- JNL_HTTPGet::~JNL_HTTPGet()
- {
- deinit();
- free(m_sendheaders);
- free(m_http_proxylpinfo);
- free(m_http_proxyhost);
-
- }
-
-
- void JNL_HTTPGet::addheader(char *header)
- {
- //if (strstr(header,"\r") || strstr(header,"\n")) return;
- if (!m_sendheaders)
- {
- m_sendheaders=(char*)malloc(strlen(header)+3);
- if (m_sendheaders)
- {
- strcpy(m_sendheaders,header);
- strcat(m_sendheaders,"\r\n");
- }
- }
- else
- {
- char *t=(char*)malloc(strlen(header)+strlen(m_sendheaders)+1+2);
- if (t)
- {
- strcpy(t,m_sendheaders);
- strcat(t,header);
- strcat(t,"\r\n");
- free(m_sendheaders);
- m_sendheaders=t;
- }
- }
- }
-
- void JNL_HTTPGet::do_encode_mimestr(char *in, char *out)
- {
- char alphabet[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
- int shift = 0;
- int accum = 0;
-
- while (*in)
- {
- if (*in)
- {
- accum <<= 8;
- shift += 8;
- accum |= *in++;
- }
- while ( shift >= 6 )
- {
- shift -= 6;
- *out++ = alphabet[(accum >> shift) & 0x3F];
- }
- }
- if (shift == 4)
- {
- *out++ = alphabet[(accum & 0xF)<<2];
- *out++='=';
- }
- else if (shift == 2)
- {
- *out++ = alphabet[(accum & 0x3)<<4];
- *out++='=';
- *out++='=';
- }
-
- *out++=0;
- }
-
-
- void JNL_HTTPGet::connect(char *url)
- {
- deinit();
- m_http_url=(char*)malloc(strlen(url)+1);
- strcpy(m_http_url,url);
- do_parse_url(m_http_url,&m_http_host,&m_http_port,&m_http_request, &m_http_lpinfo);
- strcpy(m_http_url,url);
- if (!m_http_host || !m_http_host[0] || !m_http_port)
- {
- m_http_state=-1;
- seterrstr("invalid URL");
- return;
- }
-
- int sendbufferlen=0;
-
- if (!m_http_proxyhost || !m_http_proxyhost[0])
- {
- sendbufferlen += 4 /* GET */ + strlen(m_http_request) + 9 /* HTTP/1.0 */ + 2;
- }
- else
- {
- sendbufferlen += 4 /* GET */ + strlen(m_http_url) + 9 /* HTTP/1.0 */ + 2;
- if (m_http_proxylpinfo&&m_http_proxylpinfo[0])
- {
- sendbufferlen+=58+strlen(m_http_proxylpinfo)*2; // being safe here
- }
- }
- sendbufferlen += 5 /* Host: */ + strlen(m_http_host) + 2;
-
- if (m_http_lpinfo&&m_http_lpinfo[0])
- {
- sendbufferlen+=46+strlen(m_http_lpinfo)*2; // being safe here
- }
-
- if (m_sendheaders) sendbufferlen+=strlen(m_sendheaders);
-
- char *str=(char*)malloc(sendbufferlen+1024);
- if (!str)
- {
- seterrstr("error allocating memory");
- m_http_state=-1;
- }
-
- if (!m_http_proxyhost || !m_http_proxyhost[0])
- {
- wsprintf(str,"GET %s HTTP/1.0\r\n",m_http_request);
- }
- else
- {
- wsprintf(str,"GET %s HTTP/1.0\r\n",m_http_url);
- }
-
- wsprintf(str+strlen(str),"Host: %s\r\n",m_http_host);
-
- if (m_http_lpinfo&&m_http_lpinfo[0])
- {
- strcat(str,"Authorization: Basic ");
- do_encode_mimestr(m_http_lpinfo,str+strlen(str));
- strcat(str,"\r\n");
- }
- if (m_http_proxylpinfo&&m_http_proxylpinfo[0])
- {
- strcat(str,"Proxy-Authorization: Basic ");
- do_encode_mimestr(m_http_proxylpinfo,str+strlen(str));
- strcat(str,"\r\n");
- }
-
- if (m_sendheaders) strcat(str,m_sendheaders);
- strcat(str,"\r\n");
-
- int a=m_recvbufsize;
- if (a < 4096) a=4096;
- m_con=new JNL_Connection(m_dns,strlen(str)+4,a);
- if (m_con)
- {
- if (!m_http_proxyhost || !m_http_proxyhost[0])
- {
- m_con->connect(m_http_host,m_http_port);
- }
- else
- {
- m_con->connect(m_http_proxyhost,m_http_proxyport);
- }
- m_con->send_string(str);
- }
- else
- {
- m_http_state=-1;
- seterrstr("could not create connection object");
- }
- free(str);
-
- }
-
- static int _strnicmp(char *b1, char *b2, int l)
- {
- while (l-- && *b1 && *b2)
- {
- char bb1=*b1++;
- char bb2=*b2++;
- if (bb1>='a' && bb1 <= 'z') bb1+='A'-'a';
- if (bb2>='a' && bb2 <= 'z') bb2+='A'-'a';
- if (bb1 != bb2) return bb1-bb2;
- }
- return 0;
- }
-
- char *_strstr(char *i, char *s)
- {
- if (strlen(i)>=strlen(s)) while (i[strlen(s)-1])
- {
- int l=strlen(s)+1;
- char *ii=i;
- char *is=s;
- while (--l>0)
- {
- if (*ii != *is) break;
- ii++;
- is++;
- }
- if (l==0) return i;
- i++;
- }
- return NULL;
- }
-
- #define strstr _strstr
-
- void JNL_HTTPGet::do_parse_url(char *url, char **host, int *port, char **req, char **lp)
- {
- char *p,*np;
- free(*host); *host=0;
- free(*req); *req=0;
- free(*lp); *lp=0;
-
- if (strstr(url,"://")) np=p=strstr(url,"://")+3;
- else np=p=url;
- while (*np != '/' && *np) np++;
- if (*np)
- {
- *req=(char*)malloc(strlen(np)+1);
- if (*req) strcpy(*req,np);
- *np++=0;
- }
- else
- {
- *req=(char*)malloc(2);
- if (*req) strcpy(*req,"/");
- }
-
- np=p;
- while (*np != '@' && *np) np++;
- if (*np)
- {
- *np++=0;
- *lp=(char*)malloc(strlen(p)+1);
- if (*lp) strcpy(*lp,p);
- p=np;
- }
- else
- {
- *lp=(char*)malloc(1);
- if (*lp) strcpy(*lp,"");
- }
- np=p;
- while (*np != ':' && *np) np++;
- if (*np)
- {
- *np++=0;
- *port=my_atoi(np);
- } else *port=80;
- *host=(char*)malloc(strlen(p)+1);
- if (*host) strcpy(*host,p);
- }
-
-
- char *JNL_HTTPGet::getallheaders()
- { // double null terminated, null delimited list
- if (m_recvheaders) return m_recvheaders;
- else return "\0\0";
- }
-
- char *JNL_HTTPGet::getheader(char *headername)
- {
- char *ret=NULL;
- if (strlen(headername)<1||!m_recvheaders) return NULL;
- char *p=m_recvheaders;
- while (*p)
- {
- if (!_strnicmp(headername,p,strlen(headername)))
- {
- ret=p+strlen(headername);
- while (*ret == ' ') ret++;
- break;
- }
- p+=strlen(p)+1;
- }
- return ret;
- }
-
- int JNL_HTTPGet::run()
- {
- int cnt=0;
- if (m_http_state==-1||!m_con) return -1; // error
-
-
- run_again:
- static char main_buf[4096];
- char *buf = main_buf;
- m_con->run();
-
- if (m_con->get_state()==JNL_Connection::STATE_ERROR)
- {
- seterrstr(m_con->get_errstr());
- return -1;
- }
- if (m_con->get_state()==JNL_Connection::STATE_CLOSED) return 1;
-
- if (m_http_state==0) // connected, waiting for reply
- {
- if (m_con->recv_lines_available()>0)
- {
- m_con->recv_line(buf,4095);
- buf[4095]=0;
- m_reply=(char*)malloc(strlen(buf)+1);
- strcpy(m_reply,buf);
-
- if (strstr(buf,"200")) m_http_state=2; // proceed to read headers normally
- else if (strstr(buf,"301") || strstr(buf,"302"))
- {
- m_http_state=1; // redirect city
- }
- else
- {
- seterrstr(buf);
- m_http_state=-1;
- return -1;
- }
- cnt=0;
- }
- else if (!cnt++) goto run_again;
- }
- if (m_http_state == 1) // redirect
- {
- while (m_con->recv_lines_available() > 0)
- {
- m_con->recv_line(buf,4096);
- if (!buf[0])
- {
- m_http_state=-1;
- return -1;
- }
- if (!_strnicmp(buf,"Location:",9))
- {
- char *p=buf+9; while (*p== ' ') p++;
- if (*p)
- {
- connect(p);
- return 0;
- }
- }
- }
- }
- if (m_http_state==2)
- {
- if (!cnt++ && m_con->recv_lines_available() < 1) goto run_again;
- while (m_con->recv_lines_available() > 0)
- {
- m_con->recv_line(buf,4096);
- if (!buf[0]) { m_http_state=3; break; }
- if (!m_recvheaders)
- {
- m_recvheaders_size=strlen(buf)+1;
- m_recvheaders=(char*)malloc(m_recvheaders_size+1);
- if (m_recvheaders)
- {
- strcpy(m_recvheaders,buf);
- m_recvheaders[m_recvheaders_size]=0;
- }
- }
- else
- {
- int oldsize=m_recvheaders_size;
- m_recvheaders_size+=strlen(buf)+1;
- char *n=(char*)malloc(m_recvheaders_size+1);
- if (n)
- {
- memcpy(n,m_recvheaders,oldsize);
- strcpy(n+oldsize,buf);
- n[m_recvheaders_size]=0;
- free(m_recvheaders);
- m_recvheaders=n;
- }
- }
- }
- }
- if (m_http_state==3)
- {
- }
- return 0;
- }
-
- int JNL_HTTPGet::get_status() // returns 0 if connecting, 1 if reading headers,
- // 2 if reading content, -1 if error.
- {
- if (m_http_state < 0) return -1;
- if (m_http_state < 2) return 0;
- if (m_http_state == 2) return 1;
- if (m_http_state == 3) return 2;
- return -1;
- }
-
- int JNL_HTTPGet::getreplycode()// returns 0 if none yet, otherwise returns http reply code.
- {
- if (!m_reply) return 0;
- char *p=m_reply;
- while (*p && *p != ' ') p++; // skip over HTTP/x.x
- if (!*p) return 0;
- return my_atoi(++p);
- }
-
- int JNL_HTTPGet::bytes_available()
- {
- if (m_con && m_http_state==3) return m_con->recv_bytes_available();
- return 0;
- }
- int JNL_HTTPGet::get_bytes(char *buf, int len)
- {
- if (m_con && m_http_state==3) return m_con->recv_bytes(buf,len);
- return 0;
- }
- int JNL_HTTPGet::peek_bytes(char *buf, int len)
- {
- if (m_con && m_http_state==3) return m_con->peek_bytes(buf,len);
- return 0;
- }
-