/** @file
Parser: http support functions.
Copyright(c) 2001-2009 ArtLebedev Group (http://www.artlebedev.com)
Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
*/
static const char * const IDENT_HTTP_C="$Date: 2010/08/10 05:27:46 $";
#include "pa_http.h"
#include "pa_common.h"
#include "pa_charsets.h"
#include "pa_request_charsets.h"
#include "pa_request.h"
#include "pa_vfile.h"
#include "pa_random.h"
// defines
#define HTTP_METHOD_NAME "method"
#define HTTP_FORM_NAME "form"
#define HTTP_BODY_NAME "body"
#define HTTP_TIMEOUT_NAME "timeout"
#define HTTP_HEADERS_NAME "headers"
#define HTTP_COOKIES_NAME "cookies"
#define HTTP_FORM_ENCTYPE_NAME "enctype"
#define HTTP_ANY_STATUS_NAME "any-status"
#define HTTP_OMIT_POST_CHARSET_NAME "omit-post-charset" // ^file::load[...;http://...;$.form[...]$.method[post]]
// by default add charset to content-type
#define HTTP_TABLES_NAME "tables"
#define HTTP_USER "user"
#define HTTP_PASSWORD "password"
#define DEFAULT_USER_AGENT "parser3"
# ifndef INADDR_NONE
# define INADDR_NONE ((ulong) -1)
# endif
#undef CRLF
#define CRLF "\r\n"
static bool set_addr(struct sockaddr_in *addr, const char* host, const short port){
memset(addr, 0, sizeof(*addr));
addr->sin_family=AF_INET;
addr->sin_port=htons(port);
if(host) {
ulong packed_ip=inet_addr(host);
if(packed_ip!=INADDR_NONE)
memcpy(&addr->sin_addr, &packed_ip, sizeof(packed_ip));
else {
struct hostent *hostIP=gethostbyname(host);
if(hostIP)
memcpy(&addr->sin_addr, hostIP->h_addr, hostIP->h_length);
else
return false;
}
} else
addr->sin_addr.s_addr=INADDR_ANY;
return true;
}
size_t guess_content_length(char* buf) {
char* ptr;
if((ptr=strstr(buf, "Content-Length:"))) // Apache
goto found;
if((ptr=strstr(buf, "content-length:"))) // Parser 3 before 3.4.0
goto found;
if((ptr=strstr(buf, "Content-length:"))) // maybe 1
goto found;
if((ptr=strstr(buf, "CONTENT-LENGTH:"))) // maybe 2
goto found;
return 0;
found:
char *error_pos;
size_t result=(size_t)strtol(ptr+15/*strlen("Content-Length:")*/, &error_pos, 0);
const size_t reasonable_initial_max=0x400*0x400*10 /*10M*/;
if(result>reasonable_initial_max) // sanity check
return reasonable_initial_max;
return 0;//result;
}
static int http_read_response(char*& response, size_t& response_size, int sock, bool fail_on_status_ne_200) {
int result=0;
// fetching some to local buffer, guessing on possible Content-Length
response_size=0x400*20; // initial size if Content-Length could not be determined
const size_t preview_size=0x400*20;
char preview_buf[preview_size+1/*terminator*/]; // 20K buffer to preview headers
ssize_t received_size=recv(sock, preview_buf, preview_size, 0);
if(received_size==0)
goto done;
if(received_size<0) {
if(int no=pa_socks_errno())
throw Exception("http.timeout",
0,
"error receiving response header: %s (%d)", pa_socks_strerr(no), no);
goto done;
}
// terminator [helps futher string searches]
preview_buf[received_size]=0;
// checking status
if(char* EOLat=strstr(preview_buf, "\n")) {
const String status_line(pa_strdup(preview_buf, EOLat-preview_buf));
ArrayString astatus;
size_t pos_after=0;
status_line.split(astatus, pos_after, " ");
const String& status_code=*astatus.get(astatus.count()>1?1:0);
result=status_code.as_int();
if(fail_on_status_ne_200 && result!=200)
throw Exception("http.status",
&status_code,
"invalid HTTP response status");
}
// detecting response_size
{
if(size_t content_length=guess_content_length(preview_buf))
response_size=preview_size+content_length; // a little more than needed, will adjust response_size by actual received size later
}
// [gcc is happier this way, see goto above]
{
// allocating initial buf
response=(char*)pa_malloc_atomic(response_size+1/*terminator*/); // just setting memory block type
char* ptr=response;
size_t todo_size=response_size;
// coping part of already received body
memcpy(ptr, preview_buf, received_size);
ptr+=received_size;
todo_size-=received_size;
// we use terminator byte for two purposes here:
// 1. we return there zero always, not knowing: maybe they would want to create String form $file.body?
// invariant: all Strings should have zero-terminated buffers
// 2. we use that out-of-size byte to detect if our Content-Length guess was wrong
// when recv gets more than we expected
// a) we know that the Content-Length guess was wrong
// b) we have space to put the first byte of extra data
// c) we use less code to detect normal situation: on last while-cycle recv expected to just return 0
while(true) {
received_size=recv(sock, ptr, todo_size+1/*there is always a place for terminator*/, 0);
if(received_size==0) {
response_size-=todo_size; // in case we received less than expected, cut down the reported size
break;
}
if(received_size<0) {
if(int no=pa_socks_errno())
throw Exception("http.timeout",
0,
"error receiving response body: %s (%d)", pa_socks_strerr(no), no);
break;
}
// they've touched the terminator?
if((size_t)received_size>todo_size)
{
// that means that our guessed response_size was not big enough
const size_t grow_chunk_size=0x400*0x400; // 1M
response_size+=grow_chunk_size;
size_t ptr_offset=ptr-response;
response=(char*)pa_realloc(response, response_size+1/*terminator*/);
ptr=response+ptr_offset;
todo_size+=grow_chunk_size;
}
// can't do this before realloc: we need <todo_size check
ptr+=received_size;
todo_size-=received_size;
}
}
done:
if(result)
{
response[response_size]=0;
return result;
}
else
throw Exception("http.response",
0,
"bad response from host - no status found (size=%u)", response_size);
}
/* ********************** request *************************** */
#if defined(SIGALRM) && defined(HAVE_SIGSETJMP) && defined(HAVE_SIGLONGJMP)
# define PA_USE_ALARM
#endif
#ifdef PA_USE_ALARM
static sigjmp_buf timeout_env;
static void timeout_handler(int /*sig*/){
siglongjmp(timeout_env, 1);
}
#endif
static size_t file_untaint(const char* str, size_t len) {
// untaint file from L_FILE_POST encoding
char* j=(char *)str;
const char* end=str+len-1;
for(const char* i=str; i<=end; i++, j++){
if(*i=='\\' && i!=end){
switch(*(i+1)){
case '0':
*j='\0';
i++;
continue;
case '\\':
*j='\\';
i++;
continue;
}
}
if(i!=j)
*j=*i;
}
return j-str; // new length
}
static int http_request(char*& response, size_t& response_size,
const char* host, short port,
const char* request, size_t request_size,
int timeout_secs,
bool fail_on_status_ne_200) {
if(!host)
throw Exception("http.host",
0,
"zero hostname"); //never
volatile // to prevent makeing it register variable, because it will be clobbered by longjmp [thanks gcc warning]
int sock=-1;
#ifdef PA_USE_ALARM
signal(SIGALRM, timeout_handler);
#endif
#ifdef PA_USE_ALARM
if(sigsetjmp(timeout_env, 1)) {
// stupid gcc [2.95.4] generated bad code
// which failed to handle sigsetjmp+throw: crashed inside of pre-throw code.
// rewritten simplier [athough duplicating closesocket code]
if(sock>=0)
closesocket(sock);
throw Exception("http.timeout",
0,
"timeout occured while retrieving document");
return 0; // never
} else {
alarm(timeout_secs);
#endif
try {
int result;
struct sockaddr_in dest;
if(!set_addr(&dest, host, port))
throw Exception("http.host",
0,
"can not resolve hostname \"%s\"", host);
if((sock=socket(AF_INET, SOCK_STREAM, IPPROTO_TCP/*0*/))<0) {
int no=pa_socks_errno();
throw Exception("http.connect",
0,
"can not make socket: %s (%d)", pa_socks_strerr(no), no);
}
// To enable SO_DONTLINGER (that is, disable SO_LINGER)
// l_onoff should be set to zero and setsockopt should be called
linger dont_linger={0,0};
setsockopt(sock, SOL_SOCKET, SO_LINGER, (const char *)&dont_linger, sizeof(dont_linger));
#ifdef WIN32
// SO_*TIMEO can be defined in .h but not implemlemented in protocol,
// failing subsequently with Option not supported by protocol (99) message
// could not suppress that, so leaving this only for win32
int timeout_ms=timeout_secs*1000;
setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (const char*)&timeout_ms, sizeof(timeout_ms));
setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, (const char*)&timeout_ms, sizeof(timeout_ms));
#endif
if(connect(sock, (struct sockaddr *)&dest, sizeof(dest))) {
int no=pa_socks_errno();
throw Exception("http.connect",
0,
"can not connect to host \"%s\": %s (%d)", host, pa_socks_strerr(no), no);
}
if(send(sock, request, request_size, 0)!=(ssize_t)request_size) {
int no=pa_socks_errno();
throw Exception("http.timeout",
0,
"error sending request: %s (%d)", pa_socks_strerr(no), no);
}
result=http_read_response(response, response_size, sock, fail_on_status_ne_200);
closesocket(sock);
#ifdef PA_USE_ALARM
alarm(0);
#endif
return result;
} catch(...) {
#ifdef PA_USE_ALARM
alarm(0);
#endif
if(sock>=0)
closesocket(sock);
rethrow;
}
#ifdef PA_USE_ALARM
}
#endif
}
#ifndef DOXYGEN
struct Http_pass_header_info {
Request_charsets* charsets;
String* request;
bool* user_agent_specified;
bool* content_type_specified;
bool* content_type_url_encoded;
};
#endif
static void http_pass_header(HashStringValue::key_type aname,
HashStringValue::value_type avalue,
Http_pass_header_info *info) {
const char* name_cstr=aname.cstr();
if(strcasecmp(name_cstr, HTTP_CONTENT_LENGTH)==0)
return;
String name=String(capitalize(name_cstr), String::L_URI);
String value=attributed_meaning_to_string(*avalue, String::L_URI, true);
*info->request << name << ": " << value << CRLF;
if(strcasecmp(name_cstr, HTTP_USER_AGENT)==0)
*info->user_agent_specified=true;
if(strcasecmp(name_cstr, HTTP_CONTENT_TYPE)==0){
*info->content_type_specified=true;
*info->content_type_url_encoded=StrStartFromNC(value.cstr(), HTTP_CONTENT_TYPE_FORM_URLENCODED);
}
}
static void http_pass_cookie(HashStringValue::key_type name,
HashStringValue::value_type value,
Http_pass_header_info *info) {
*info->request << String(name, String::L_HTTP_COOKIE) << "="
<< attributed_meaning_to_string(*value, String::L_HTTP_COOKIE, true)
<< "; ";
}
static const String* basic_authorization_field(const char* user, const char* pass) {
if(!user&& !pass)
return 0;
String combined;
if(user)
combined<<user;
combined<<":";
if(pass)
combined<<pass;
String* result=new String("Basic ");
*result<<pa_base64_encode(combined.cstr(), combined.length());
return result;
}
static void form_string_value2string(
HashStringValue::key_type key,
const String& value,
String& result)
{
result << String(key, String::L_URI) << "=" << String(value, String::L_URI) << "&";
}
#ifndef DOXYGEN
struct Form_table_value2string_info {
HashStringValue::key_type key;
String& result;
Form_table_value2string_info(HashStringValue::key_type akey, String& aresult):
key(akey), result(aresult) {}
};
#endif
static void form_table_value2string(Table::element_type row, Form_table_value2string_info* info) {
form_string_value2string(info->key, *row->get(0), info->result);
}
static void form_value2string(
HashStringValue::key_type key,
HashStringValue::value_type value,
String* result)
{
if(const String* svalue=value->get_string())
form_string_value2string(key, *svalue, *result);
else if(Table* tvalue=value->get_table()) {
Form_table_value2string_info info(key, *result);
tvalue->for_each(form_table_value2string, &info);
} else
throw Exception(PARSER_RUNTIME,
new String(key, String::L_TAINTED),
"is %s, "HTTP_FORM_NAME" option value can be string or table only (file is allowed for $."HTTP_METHOD_NAME"[POST] + $."HTTP_FORM_ENCTYPE_NAME"["HTTP_CONTENT_TYPE_MULTIPART_FORMDATA"])", value->type());
}
const char* pa_form2string(HashStringValue& form, Request_charsets& charsets) {
String string;
form.for_each<String*>(form_value2string, &string);
return string.untaint_and_transcode_cstr(String::L_URI, &charsets);
}
struct FormPart {
Request* r;
const char* boundary;
String string;
Form_table_value2string_info* info;
};
static void form_part_boundary_header(FormPart& part, String::Body name, const char* file_name=0){
part.string << "--" << part.boundary
<< CRLF CONTENT_DISPOSITION_CAPITALIZED ": form-data; name=\""
<< Charset::transcode(name, part.r->charsets.source(), part.r->charsets.client())
<< "\"";
if(file_name){
if(strcmp(file_name, NONAME_DAT)!=0)
part.string << "; filename=\"" << file_name << "\"";
part.string << CRLF HTTP_CONTENT_TYPE_CAPITALIZED ": " << part.r->mime_type_of(file_name);
}
part.string << CRLF CRLF;
}
static void form_string_value2part(
HashStringValue::key_type key,
const String& value,
FormPart& part)
{
form_part_boundary_header(part, key);
part.string << Charset::transcode(value, part.r->charsets.source(), part.r->charsets.client()) << CRLF;
}
static void form_file_value2part(
HashStringValue::key_type key,
VFile& vfile,
FormPart& part)
{
form_part_boundary_header(part, key, vfile.fields().get(name_name)->as_string().cstr());
part.string.append_know_length(vfile.value_ptr(), vfile.value_size(), String::L_FILE_POST);
part.string << CRLF;
}
static void form_table_value2part(Table::element_type row, FormPart* part) {
form_string_value2part(part->info->key, *row->get(0), *part);
}
static void form_value2part(
HashStringValue::key_type key,
HashStringValue::value_type value,
FormPart& part)
{
if(const String* svalue=value->get_string())
form_string_value2part(key, *svalue, part);
else if(Table* tvalue=value->get_table()) {
Form_table_value2string_info info(key, part.string);
part.info = &info;
tvalue->for_each(form_table_value2part, &part);
} else if(VFile* vfile=static_cast<VFile *>(value->as("file"))){
form_file_value2part(key, *vfile, part);
} else
throw Exception(PARSER_RUNTIME,
new String(key, String::L_TAINTED),
"is %s, "HTTP_FORM_NAME" option value can be string, table or file only", value->type());
}
const char* pa_form2string_multipart(HashStringValue& form, Request& r, const char* boundary, size_t& post_size){
FormPart formpart;
formpart.r=&r;
formpart.boundary=boundary;
formpart.info=NULL;
form.for_each<FormPart&>(form_value2part, formpart);
formpart.string << "--" << boundary << "--";
post_size=formpart.string.length(); // very surprizing, but it calculates correct post_size even with binary files!
return formpart.string.untaint_cstr(String::L_AS_IS); // without transcoding
}
static void find_headers_end(char* p,
char*& headers_end_at,
char*& raw_body)
{
raw_body=p;
// \n\n
// \r\n\r\n
while((p=strchr(p, '\n'))) {
headers_end_at=++p; // \n>.<
if(*p=='\r') // \r\n>\r?<\n
p++;
if(*p=='\n') { // \r\n\r>\n?<
raw_body=p+1;
return;
}
}
headers_end_at=0;
}
/// @todo build .cookies field. use ^file.tables.SET-COOKIES.menu{ for now
File_read_http_result pa_internal_file_read_http(Request& r,
const String& file_spec,
bool as_text,
HashStringValue *options,
bool transcode_text_result) {
File_read_http_result result;
char host[MAX_STRING];
const char* uri;
short port;
const char* method="GET";
bool method_is_get=true;
HashStringValue* form=0;
const char* body_cstr=0;
int timeout_secs=2;
bool fail_on_status_ne_200=true;
bool omit_post_charset=false;
Value* vheaders=0;
Value* vcookies=0;
Value* vbody=0;
Charset *asked_remote_charset=0;
const char* user_cstr=0;
const char* password_cstr=0;
const char* encode=0;
bool multipart=false;
if(options) {
int valid_options=pa_get_valid_file_options_count(*options);
if(Value* vmethod=options->get(HTTP_METHOD_NAME)) {
valid_options++;
method=vmethod->as_string().change_case(r.charsets.source(), String::CC_UPPER).cstr();
method_is_get=strcmp(method, "GET")==0;
}
if(Value* vencode=options->get(HTTP_FORM_ENCTYPE_NAME)) {
valid_options++;
encode=vencode->as_string().cstr();
}
if(Value* vform=options->get(HTTP_FORM_NAME)) {
valid_options++;
form=vform->get_hash();
}
if(vbody=options->get(HTTP_BODY_NAME)) {
valid_options++;
}
if(Value* vtimeout=options->get(HTTP_TIMEOUT_NAME)) {
valid_options++;
timeout_secs=vtimeout->as_int();
}
if(vheaders=options->get(HTTP_HEADERS_NAME)) {
valid_options++;
}
if(vcookies=options->get(HTTP_COOKIES_NAME)) {
valid_options++;
}
if(Value* vany_status=options->get(HTTP_ANY_STATUS_NAME)) {
valid_options++;
fail_on_status_ne_200=!vany_status->as_bool();
}
if(Value* vomit_post_charset=options->get(HTTP_OMIT_POST_CHARSET_NAME)){
valid_options++;
omit_post_charset=vomit_post_charset->as_bool();
}
if(Value* vcharset_name=options->get(PA_CHARSET_NAME)) {
asked_remote_charset=&charsets.get(vcharset_name->as_string().
change_case(r.charsets.source(), String::CC_UPPER));
}
if(Value* vuser=options->get(HTTP_USER)) {
valid_options++;
user_cstr=vuser->as_string().cstr();
}
if(Value* vpassword=options->get(HTTP_PASSWORD)) {
valid_options++;
password_cstr=vpassword->as_string().cstr();
}
if(valid_options!=options->count())
throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
}
if(!asked_remote_charset) // defaulting to $request:charset
asked_remote_charset=&(r.charsets).source();
if(encode){
if(method_is_get)
throw Exception(PARSER_RUNTIME,
0,
"you can not use $."HTTP_FORM_ENCTYPE_NAME" option with method GET");
multipart=strcasecmp(encode, HTTP_CONTENT_TYPE_MULTIPART_FORMDATA)==0;
if(!multipart && strcasecmp(encode, HTTP_CONTENT_TYPE_FORM_URLENCODED)!=0)
throw Exception(PARSER_RUNTIME,
0,
"$."HTTP_FORM_ENCTYPE_NAME" option value can be "HTTP_CONTENT_TYPE_FORM_URLENCODED" or "HTTP_CONTENT_TYPE_MULTIPART_FORMDATA" only");
}
if(vbody){
if(method_is_get)
throw Exception(PARSER_RUNTIME,
0,
"you can not use $."HTTP_BODY_NAME" option with method GET");
if(form)
throw Exception(PARSER_RUNTIME,
0,
"you can not use options $."HTTP_BODY_NAME" and $."HTTP_FORM_NAME" together");
}
//preparing request
String& connect_string=*new String(file_spec);
String request_head_and_body;
{
// influence URLencoding of tainted pieces to String::L_URI lang
Temp_client_charset temp(r.charsets, *asked_remote_charset);
const char* connect_string_cstr=connect_string.untaint_and_transcode_cstr(String::L_URI, &(r.charsets));
const char* current=connect_string_cstr;
if(strncmp(current, "http://", 7)!=0)
throw Exception(PARSER_RUNTIME,
&connect_string,
"does not start with http://"); //never
current+=7;
strncpy(host, current, sizeof(host)-1); host[sizeof(host)-1]=0;
char* host_uri=lsplit(host, '/');
uri=host_uri?current+(host_uri-1-host):"/";
char* port_cstr=lsplit(host, ':');
char* error_pos=0;
port=port_cstr?(short)strtol(port_cstr, &error_pos, 0):80;
// making request head
String head;
head << method << " " << uri;
if(method_is_get && form)
head << (strchr(uri, '?')!=0?"&":"?") << pa_form2string(*form, r.charsets);
head <<" HTTP/1.0" CRLF "Host: "<< host << CRLF;
char* boundary=0;
if(multipart){
uuid uuid=get_uuid();
const int boundary_bufsize=10+32+1/*for zero-teminator*/+1/*for faulty snprintfs*/;
boundary=new(PointerFreeGC) char[boundary_bufsize];
snprintf(boundary, boundary_bufsize,
"----------%08X%04X%04X%02X%02X%02X%02X%02X%02X%02X%02X",
uuid.time_low, uuid.time_mid, uuid.time_hi_and_version,
uuid.clock_seq >> 8, uuid.clock_seq & 0xFF,
uuid.node[0], uuid.node[1], uuid.node[2],
uuid.node[3], uuid.node[4], uuid.node[5]);
}
String user_headers;
bool user_agent_specified=false;
bool content_type_specified=false;
bool content_type_url_encoded=false;
if(vheaders && !vheaders->is_string()) { // allow empty
if(HashStringValue *headers=vheaders->get_hash()) {
Http_pass_header_info info={
&(r.charsets),
&user_headers,
&user_agent_specified,
&content_type_specified,
&content_type_url_encoded};
headers->for_each<Http_pass_header_info*>(http_pass_header, &info);
} else
throw Exception(PARSER_RUNTIME,
0,
"headers param must be hash");
};
size_t post_size=0;
if(form && !method_is_get) {
head << "Content-Type: " << (multipart ? HTTP_CONTENT_TYPE_MULTIPART_FORMDATA : HTTP_CONTENT_TYPE_FORM_URLENCODED);
if(!omit_post_charset)
head << "; charset=" << asked_remote_charset->NAME_CSTR();
if(multipart) {
head << "; boundary=" << boundary;
body_cstr=pa_form2string_multipart(*form, r/*charsets & mime_type needed*/, boundary, post_size/*correct post_size returned here*/);
} else {
body_cstr=pa_form2string(*form, r.charsets);
post_size=strlen(body_cstr);
}
head << CRLF;
} else if(vbody) {
// $.body was specified
if(content_type_url_encoded){
// transcode + url-encode
body_cstr=vbody->as_string().untaint_and_transcode_cstr(String::L_URI, &(r.charsets));
} else {
// content-type != application/x-www-form-urlencoded -> transcode only, don't url-encode!
body_cstr=Charset::transcode(
String::C(vbody->as_string().cstr(), vbody->as_string().length()),
r.charsets.source(),
*asked_remote_charset
);
}
post_size=strlen(body_cstr);
}
// http://www.ietf.org/rfc/rfc2617.txt
if(const String* authorization_field_value=basic_authorization_field(user_cstr, password_cstr))
head << "Authorization: " << *authorization_field_value << CRLF;
head << user_headers;
if(!user_agent_specified) // defaulting
head << "User-Agent: " DEFAULT_USER_AGENT CRLF;
if(form && !method_is_get && content_type_specified) // POST + form + content-type was specified
throw Exception(PARSER_RUNTIME,
0,
"$.content-type can't be specified with method POST");
if(vcookies && !vcookies->is_string()){ // allow empty
if(HashStringValue* cookies=vcookies->get_hash()) {
head << "Cookie: ";
Http_pass_header_info info={&(r.charsets), &head, 0, 0, 0};
cookies->for_each<Http_pass_header_info*>(http_pass_cookie, &info);
head << CRLF;
} else
throw Exception(PARSER_RUNTIME,
0,
"cookies param must be hash");
}
if(body_cstr)
head << "Content-Length: " << format(post_size, "%u") << CRLF;
// head + end of header
request_head_and_body << head.untaint_and_transcode_cstr(String::L_URI, &(r.charsets)) << CRLF;
// body
if(body_cstr)
request_head_and_body << body_cstr;
}
const char* request_cstr=request_head_and_body.cstr();
size_t request_size=request_head_and_body.length();
if(multipart)
request_size=file_untaint(request_cstr, request_size);
char* response;
size_t response_size;
// sending request
int status_code=http_request(response, response_size,
host, port, request_cstr, request_size,
timeout_secs, fail_on_status_ne_200);
// processing results
char* raw_body; size_t raw_body_size;
char* headers_end_at;
find_headers_end(response,
headers_end_at,
raw_body);
raw_body_size=response_size-(raw_body-response);
result.headers=new HashStringValue;
VHash* vtables=new VHash;
result.headers->put(HTTP_TABLES_NAME, vtables);
Charset* real_remote_charset=0; // undetected, yet
if(headers_end_at) {
*headers_end_at=0;
const String header_block(String::C(response, headers_end_at-response), String::L_TAINTED);
ArrayString aheaders;
HashStringValue& tables=vtables->hash();
size_t pos_after=0;
header_block.split(aheaders, pos_after, "\n");
// processing headers
size_t aheaders_count=aheaders.count();
for(size_t i=1; i<aheaders_count; i++) {
const String& line=*aheaders.get(i);
size_t pos=line.pos(':');
if(pos==STRING_NOT_FOUND || pos<1)
throw Exception("http.response",
&connect_string,
"bad response from host - bad header \"%s\"", line.cstr());
const String::Body HEADER_NAME=line.mid(0, pos).change_case(r.charsets.source(), String::CC_UPPER);
const String& HEADER_VALUE=line.mid(pos+1, line.length()).trim(String::TRIM_BOTH, " \t\r");
if(as_text && HEADER_NAME==HTTP_CONTENT_TYPE_UPPER)
real_remote_charset=detect_charset(HEADER_VALUE.cstr());
// tables
{
Value *valready=(Value *)tables.get(HEADER_NAME);
bool existed=valready!=0;
Table *table;
if(existed) {
// second+ appearence
table=valready->get_table();
} else {
// first appearence
Table::columns_type columns=new ArrayString(1);
*columns+=new String("value");
table=new Table(columns);
}
// this string becomes next row
ArrayString& row=*new ArrayString(1);
row+=&HEADER_VALUE;
*table+=&row;
// not existed before? add it
if(!existed)
tables.put(HEADER_NAME, new VTable(table));
}
result.headers->put(HEADER_NAME, new VString(HEADER_VALUE));
}
}
if(as_text && raw_body_size>=3 && strncmp(raw_body, "\xEF\xBB\xBF", 3)==0){
// skip UTF-8 signature (BOM code)
raw_body+=3;
raw_body_size-=3;
if(!real_remote_charset)
real_remote_charset=&UTF8_charset;
}
// output response
String::C real_body=String::C(raw_body, raw_body_size);
if(as_text && transcode_text_result && raw_body_size) { // raw_body_size must be checked because transcode returns CONST string in case length==0, which contradicts hacking few lines below
// defaulting to used-asked charset [it's never empty!]
if(!real_remote_charset)
real_remote_charset=asked_remote_charset;
real_body=Charset::transcode(real_body, *real_remote_charset, r.charsets.source());
}
result.str=const_cast<char *>(real_body.str); // hacking a little
result.length=real_body.length;
if(as_text && result.length)
fix_line_breaks(result.str, result.length);
result.headers->put(file_status_name, new VInt(status_code));
return result;
}
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