--- parser3/src/main/pa_http.C	2015/04/30 17:37:43	1.65
+++ parser3/src/main/pa_http.C	2020/10/10 06:08:36	1.84
@@ -1,19 +1,20 @@
 /** @file
 	Parser: http support functions.
 
-	Copyright (c) 2001-2012 Art. Lebedev Studio (http://www.artlebedev.com)
+	Copyright (c) 2001-2017 Art. Lebedev Studio (http://www.artlebedev.com)
 	Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
  */
 
 #include "pa_http.h"
 #include "pa_common.h"
+#include "pa_base64.h"
 #include "pa_charsets.h"
 #include "pa_request_charsets.h"
 #include "pa_request.h"
 #include "pa_vfile.h"
 #include "pa_random.h"
 
-volatile const char * IDENT_PA_HTTP_C="$Id: pa_http.C,v 1.65 2015/04/30 17:37:43 moko Exp $" IDENT_PA_HTTP_H; 
+volatile const char * IDENT_PA_HTTP_C="$Id: pa_http.C,v 1.84 2020/10/10 06:08:36 moko Exp $" IDENT_PA_HTTP_H; 
 
 #ifdef _MSC_VER
 #include <windows.h>
@@ -32,11 +33,10 @@ volatile const char * IDENT_PA_HTTP_C="$
 #define HTTP_ANY_STATUS_NAME	"any-status"
 #define HTTP_OMIT_POST_CHARSET_NAME	"omit-post-charset"	// ^file::load[...;http://...;$.method[post]] by default adds charset to content-type
 
-#define HTTP_TABLES_NAME "tables"
-
 #define HTTP_USER "user"
 #define HTTP_PASSWORD "password"
 
+#define HTTP_USER_AGENT "user-agent"
 #define DEFAULT_USER_AGENT "parser3"
 
 #ifndef INADDR_NONE
@@ -48,6 +48,25 @@ volatile const char * IDENT_PA_HTTP_C="$
 
 // helpers
 
+bool ResponseHeaders::add_header(const char *line){
+	const char *value=strchr(line, ':');
+
+	if(value && value != line){ // we need only headers, not the response code
+		Header header(str_upper(line, value-line), String::Body(value+1).trim(String::TRIM_BOTH, " \t\n\r"));
+
+		if(header.name == String::Body(HTTP_CONTENT_TYPE_UPPER) && content_type.is_empty())
+			content_type=header.value;
+
+		if(header.name == String::Body("CONTENT-LENGTH") && content_length==0)
+			content_length=pa_atoul(header.value.cstr(), 10);
+
+		headers+=header;
+
+		return true;
+	}
+	return false;
+}
+
 class Cookies_table_template_columns: public ArrayString {
 public:
 	Cookies_table_template_columns() {
@@ -77,123 +96,160 @@ static bool set_addr(struct sockaddr_in
 	return false;
 }
 
-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;
-}
+class HTTP_response : public PA_Allocated {
+public:
+	char *buf;
+	size_t length;
+	size_t buf_size;
+	size_t body_offset;
+
+	ResponseHeaders headers;
+	const String &url;
+
+	HTTP_response(const String& aurl) : buf(NULL), length(0), buf_size(0), body_offset(0), url(aurl){}
+
+	void resize(size_t size){
+		buf_size=size;
+		buf=(char *)pa_realloc(buf, size + 1);
+	}
 
-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");
+	bool read(int sock, size_t size){
+		if(length+size>buf_size)
+			resize(buf_size*2 + size);
+		ssize_t received_size=recv(sock, buf + length, size, 0);
+		if(received_size==0)
+			return false;
+		if(received_size<0) {
+			if(int no=pa_socks_errno())
+				throw Exception("http.timeout", &url, "error receiving response body: %s (%d)", pa_socks_strerr(no), no);
+			return false;
+		}
+		length+=received_size;
+		buf[length]='\0';
+		return true;
 	}
-	// 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
+
+	size_t first_line(){
+		char *headers=strchr(buf, '\n');
+		if(!headers)
+			return false;
+
+		return headers-buf;
 	}
 
-	// [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
+	const char *status_code(char *status_line, int &result){
+		char* status_start = strchr(status_line, ' ');
+
+		if(!(status_start++))
+			return status_line;
+
+		char* status_end=strchr(status_start, ' ');
+
+		if(!status_end)
+			return status_line;
+
+		if(status_end==status_start)
+			return status_line;
+
+		const char *result_str=pa_strdup(status_start, status_end-status_start);
+		result=pa_atoui(result_str, 10);
+		return result_str;
+	}
+
+	bool body_start(){
+		char *p=buf;
+		while((p=strchr(p, '\n'))) {
+			if(p[1]=='\r' && p[2]=='\n'){  // \r\n\r\n
+				*p='\0';
+				body_offset=p-buf+3;
+				return true;
+			}
+			if(p[1]=='\n') { // \n\n
+				*p='\0';
+				body_offset=p-buf+2;
+				return true;
+			}
+			p++;
+		}
+		return false;
+	}
+
+	void parse_headers(){
+		const String header_block(buf, String::L_TAINTED);
+		
+		ArrayString aheaders;
+		header_block.split(aheaders, 0, "\n");
+
+		Array_iterator<const String*> i(aheaders);
+		i.next(); // skipping status
+		for(;i.has_next();){
+			const char *line=i.next()->cstr();
+			if(!headers.add_header(line))
+				throw Exception("http.response", &url, "bad response from host - bad header \"%s\"", line);
+		}
+	}
+
+};
+
+enum HTTP_response_state {
+	HTTP_STATUS_CODE,
+	HTTP_HEADERS,
+	HTTP_BODY
+};
+
+static int http_read_response(HTTP_response& response, int sock, bool fail_on_status_ne_200) {
+	HTTP_response_state state=HTTP_STATUS_CODE;
+	int result=0;
+
+	size_t chunk_size=0x400*16;
+	response.resize(2*chunk_size);
+
+	while(response.read(sock, chunk_size)){
+		switch(state){
+			case HTTP_STATUS_CODE: {
+				size_t status_size=response.first_line();
+				if(!status_size)
+					break;
+
+				const char *status=response.status_code(pa_strdup(response.buf, status_size), result);
+
+				if(!result || fail_on_status_ne_200 && result!=200)
+					throw Exception("http.status", status ? new String(status) : &String::Empty, "invalid HTTP response status");
+
+				state=HTTP_HEADERS;
+			}
+
+			case HTTP_HEADERS: {
+				if(!response.body_start())
+					break;
+
+				response.parse_headers();
+
+				size_t content_length=check_file_size(response.headers.content_length, response.url);
+				if(content_length>0 && (content_length + response.body_offset) > response.length){
+					response.resize(content_length + response.body_offset + 0x400*64);
+				}
+
+				state=HTTP_BODY;
 				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); 
+
+			case HTTP_BODY: {
+				chunk_size=0x400*64;
 				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;
+
+	if(state==HTTP_STATUS_CODE)
+		throw Exception("http.response", &response.url, "bad response from host - no status found (size=%u)", response.length);
+
+	if(state==HTTP_HEADERS){
+		response.parse_headers();
+		response.body_offset=response.length;
 	}
-	else
-		throw Exception("http.response",
-			0,
-			"bad response from host - no status found (size=%u)", response_size); 
+
+	return result;
 }
 
 /* ********************** request *************************** */
@@ -209,15 +265,9 @@ static void timeout_handler(int /*sig*/)
 }
 #endif
 
-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) {
+static int http_request(HTTP_response& response, 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
+		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;
@@ -231,9 +281,7 @@ static int http_request(char*& response,
 		// rewritten simplier [athough duplicating closesocket code]
 		if(sock>=0) 
 			closesocket(sock); 
-		throw Exception("http.timeout", 
-			0, 
-			"timeout occured while retrieving document"); 
+		throw Exception("http.timeout", 0, "timeout occurred while retrieving document"); 
 		return 0; // never
 	} else {
 		alarm(timeout_secs); 
@@ -243,15 +291,11 @@ static int http_request(char*& response,
 			struct sockaddr_in dest;
 		
 			if(!set_addr(&dest, host, port))
-				throw Exception("http.host", 
-					0, 
-					"can not resolve hostname \"%s\"", host); 
+				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); 
+				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) 
@@ -270,30 +314,26 @@ static int http_request(char*& response,
 
 			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); 
+				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); 
+				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); 
+			result=http_read_response(response, sock, fail_on_status_ne_200);
+			closesocket(sock);
 #ifdef PA_USE_ALARM
-			alarm(0); 
+			alarm(0);
 #endif
 			return result;
 		} catch(...) {
 #ifdef PA_USE_ALARM
-			alarm(0); 
+			alarm(0);
 #endif
-			if(sock>=0) 
-				closesocket(sock); 
+			if(sock>=0)
+				closesocket(sock);
 			rethrow;
 		}
 #ifdef PA_USE_ALARM
@@ -367,15 +407,11 @@ static const String* basic_authorization
 		combined<<pass;
 	
 	String* result=new String("Basic ");
-	*result<<pa_base64_encode(combined.cstr(), combined.length());
+	*result<<pa_base64_encode(combined.cstr(), combined.length(), Base64Options(false /*no wrap*/));
 	return result;
 }
 
-static void form_string_value2string(
-					HashStringValue::key_type key, 
-					const String& value, 
-					String& 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) << "&";
 }
 
@@ -391,19 +427,15 @@ struct Form_table_value2string_info {
 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) 
-{
+
+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),
+		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());
 }
 
@@ -456,11 +488,8 @@ struct FormPart {
 	}
 };
 
-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=\"" 
-				<< name
-				<< "\"";
+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=\"" << name << "\"";
 	if(file_name){
 		if(strcmp(file_name, NONAME_DAT)!=0)
 			*part.string << "; filename=\"" << file_name << "\"";
@@ -469,20 +498,12 @@ static void form_part_boundary_header(Fo
 	*part.string << CRLF CRLF;
 }
 
-static void form_string_value2part(
-				HashStringValue::key_type key,
-				const String& value,
-				FormPart& part)
-{
+static void form_string_value2part(HashStringValue::key_type key, const String& value, FormPart& part) {
 	form_part_boundary_header(part, key);
 	*part.string << value << CRLF;
 }
 
-static void form_file_value2part(
-				HashStringValue::key_type key,
-				VFile& vfile,  
-				FormPart& part)
-{
+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.blocks+=FormPart::BinaryBlock(part.string, part.r);
 	part.blocks+=FormPart::BinaryBlock(vfile.value_ptr(), vfile.value_size());
@@ -494,11 +515,7 @@ static void form_table_value2part(Table:
 	form_string_value2part(part->info->key, *row->get(0), *part);
 }
 
-static void form_value2part(
-				HashStringValue::key_type key,
-				HashStringValue::value_type value,
-				FormPart& 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()) {
@@ -508,9 +525,7 @@ static void form_value2part(
 	} 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());
+		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){
@@ -521,25 +536,6 @@ const char* pa_form2string_multipart(Has
 	return formpart.post(post_size);
 }
 
-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;
-}
-
 // Set-Cookie: name=value; Domain=docs.foo.com; Path=/accounts; Expires=Wed, 13-Jan-2021 22:23:01 GMT; Secure; HttpOnly
 static ArrayString* parse_cookie(Request& r, const String& cookie) {
 	char *current=pa_strdup(cookie.cstr());
@@ -616,14 +612,29 @@ Table* parse_cookies(Request& r, Table *
 	return &result;
 }
 
+void tables_update(HashStringValue& tables, const String::Body name, const String& value){
+	Table *table;
+	if(Value *valready=tables.get(name)) {
+		// second+ appearence
+		table=valready->get_table();
+	} else {
+		// first appearence
+		Table::columns_type columns=new ArrayString(1);
+		*columns+=new String("value");
+		table=new Table(columns);
+		tables.put(name, new VTable(table));
+	}
+	// this string becomes next row
+	ArrayString& row=*new ArrayString(1);
+	row+=&value;
+	*table+=&row;
+}
+
 /// @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 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 *idna_host;
 	const char* uri; 
 	short port=80;
 	const char* method="GET";
@@ -635,7 +646,7 @@ File_read_http_result pa_internal_file_r
 	Value* vheaders=0;
 	Value* vcookies=0;
 	Value* vbody=0;
-	Charset *asked_remote_charset=0;
+	Charset* asked_remote_charset=0;
 	Charset* real_remote_charset=0;
 	const char* user_cstr=0;
 	const char* password_cstr=0;
@@ -680,11 +691,11 @@ File_read_http_result pa_internal_file_r
 			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));
+			asked_remote_charset=&pa_charsets.get(vcharset_name->as_string());
 		} 
 		if(Value* vresponse_charset_name=options->get(PA_RESPONSE_CHARSET_NAME)) {
 			valid_options++;
-			real_remote_charset=&charsets.get(vresponse_charset_name->as_string().change_case(r.charsets.source(), String::CC_UPPER));
+			real_remote_charset=&pa_charsets.get(vresponse_charset_name->as_string());
 		} 
 		if(Value* vuser=options->get(HTTP_USER)) {
 			valid_options++;
@@ -703,28 +714,20 @@ File_read_http_result pa_internal_file_r
 
 	if(encode){
 		if(method_is_get)
-			throw Exception(PARSER_RUNTIME,
-				0,
-				"you can not use $." HTTP_FORM_ENCTYPE_NAME " option with method 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,
-				"$." HTTP_FORM_ENCTYPE_NAME " option value can be " HTTP_CONTENT_TYPE_FORM_URLENCODED " or " HTTP_CONTENT_TYPE_MULTIPART_FORMDATA " only");
+			throw Exception(PARSER_RUNTIME, 0, "$." 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");
+			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");
+			throw Exception(PARSER_RUNTIME, 0, "you can not use options $." HTTP_BODY_NAME " and $." HTTP_FORM_NAME " together");
 	}
 
 	//preparing request
@@ -740,9 +743,7 @@ File_read_http_result pa_internal_file_r
 
 		const char* current=connect_string_cstr;
 		if(strncmp(current, "http://", 7)!=0)
-			throw Exception(PARSER_RUNTIME, 
-				&connect_string, 
-				"does not start with http://"); //never
+			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;
@@ -757,30 +758,20 @@ File_read_http_result pa_internal_file_r
 				throw Exception(PARSER_RUNTIME, &connect_string, "invalid port number '%s'", port_cstr);
 		}
 
+		idna_host=pa_idna_encode(host, r.charsets.source());
+
 		// 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;
+		head <<" HTTP/1.0" CRLF "Host: "<< idna_host;
 		if (port != 80)
 			head << ":" << port_cstr;
 		head << 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]);
-		}
+		char* boundary= multipart ? get_uuid_boundary() : 0;
 
 		String user_headers;
 		bool user_agent_specified=false;
@@ -796,9 +787,7 @@ File_read_http_result pa_internal_file_r
 					&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"); 
+				throw Exception(PARSER_RUNTIME, 0, "headers param must be hash"); 
 		};
 
 		const char* request_body=0;
@@ -824,11 +813,8 @@ File_read_http_result pa_internal_file_r
 				request_body=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!
-				request_body=Charset::transcode(
-					String::C(vbody->as_string().cstr(), vbody->as_string().length()),
-					r.charsets.source(),
-					*asked_remote_charset
-				);
+				const String &sbody=vbody->as_string();
+				request_body=Charset::transcode(String::C(sbody.cstr(), sbody.length()), r.charsets.source(), *asked_remote_charset).str;
 			}
 			post_size=strlen(request_body);
 		}
@@ -843,9 +829,7 @@ File_read_http_result pa_internal_file_r
 			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,
-				"$.content-type can't be specified with method POST"); 
+			throw Exception(PARSER_RUNTIME, 0, "$.content-type can't be specified with method POST"); 
 
 		if(vcookies && !vcookies->is_string()){ // allow empty
 			if(HashStringValue* cookies=vcookies->get_hash()) {
@@ -854,9 +838,7 @@ File_read_http_result pa_internal_file_r
 				cookies->for_each<Http_pass_header_info*>(http_pass_cookie, &info); 
 				head << CRLF;
 			} else
-				throw Exception(PARSER_RUNTIME, 
-					0,
-					"cookies param must be hash");
+				throw Exception(PARSER_RUNTIME, 0, "cookies param must be hash");
 		}
 
 		if(request_body)
@@ -879,99 +861,49 @@ File_read_http_result pa_internal_file_r
 		}
 	}
 	
-	char* response;
-	size_t response_size;
+
+	HTTP_response response(connect_string);
 
 	// sending request
-	int status_code=http_request(response, response_size,
-		pa_idna_encode(host, r.charsets.source()), port, request, 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);
-	
+	int status_code=http_request(response, idna_host, port, request, request_size, timeout_secs, fail_on_status_ne_200);
+
+	// processing results
+	char* raw_body=response.buf + response.body_offset;
+	size_t raw_body_size=response.length - response.body_offset;
+
 	result.headers=new HashStringValue;
 	VHash* vtables=new VHash;
-	result.headers->put(HTTP_TABLES_NAME, vtables);
+	result.headers->put("tables", vtables);
 
-	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();
+	if (!real_remote_charset && !response.headers.content_type.is_empty())
+		real_remote_charset=detect_charset(response.headers.content_type.cstr());
 
-		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)
-				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));
-			}
+	if(as_text)
+		real_remote_charset=pa_charsets.checkBOM(raw_body, raw_body_size, real_remote_charset);
 
-			result.headers->put(HEADER_NAME, new VString(HEADER_VALUE));
-		}
+	if (!real_remote_charset)
+		real_remote_charset=asked_remote_charset; // never null
 
-		// filling $.cookies
-		if(Value *vcookies=(Value *)tables.get("SET-COOKIE"))
-			result.headers->put(HTTP_COOKIES_NAME, new VTable(parse_cookies(r, vcookies->get_table())));
-	}
+	for(Array_iterator<ResponseHeaders::Header> i(response.headers.headers); i.has_next(); ){
+		ResponseHeaders::Header header=i.next();
+
+		header.transcode(*real_remote_charset, r.charsets.source());
 
-	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;
+		String &header_value=*new String(header.value, String::L_TAINTED);
+
+		tables_update(vtables->hash(), header.name, header_value);
+		result.headers->put(header.name, new VString(header_value));
 	}
 
+	// filling $.cookies
+	if(Value *vcookies=vtables->hash().get("SET-COOKIE"))
+		result.headers->put(HTTP_COOKIES_NAME, new VTable(parse_cookies(r, vcookies->get_table())));
+
 	// 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
@@ -984,3 +916,172 @@ File_read_http_result pa_internal_file_r
 
 	return result;
 }
+
+/* ********************** httpd *************************** */
+
+class HTTPD_request : public HTTP_response {
+public:
+	const char *method;
+	const char *uri;
+
+	HTTPD_request() : HTTP_response(String::Empty), method(NULL), uri(NULL){};
+
+	const char *extract_method(char *method_line){
+		char* uri_start = strchr(method_line, ' ');
+
+		if(!uri_start || uri_start == method_line)
+			return NULL;
+
+		char* uri_end=strchr(uri_start+1, ' ');
+
+		if(!uri_end || uri_end == uri_start+1)
+			return NULL;
+
+		uri=pa_strdup(uri_start+1, uri_end-uri_start-1);
+		return str_upper(method_line, uri_start-method_line);
+	}
+
+	void read_header(int sock);
+};
+
+enum HTTPD_request_state {
+	HTTPD_METHOD,
+	HTTPD_HEADERS
+};
+
+void HTTPD_request::read_header(int sock) {
+	enum HTTPD_request_state state = HTTPD_METHOD;
+
+	size_t chunk_size = 0x400*4;
+	resize(chunk_size);
+
+	while(read(sock, chunk_size)){
+		switch(state){
+			case HTTPD_METHOD: {
+				size_t method_size = first_line();
+				if(!method_size)
+					break;
+
+				char *method_line = pa_strdup(buf, method_size);
+				method = extract_method(method_line);
+
+				if(!method || strcmp(method, "GET") && strcmp(method, "HEAD") && strcmp(method, "POST") && strcmp(method, "PUT") && strcmp(method, "DELETE"))
+					throw Exception("httpd.method", new String(method ? method : method_line), "invalid request method");
+				state = HTTPD_HEADERS;
+			}
+
+			case HTTPD_HEADERS: {
+				if(!body_start())
+					break;
+
+				parse_headers();
+				return;
+			}
+		}
+	}
+
+	if(state == HTTPD_METHOD)
+		throw Exception("httpd.request", 0, "bad request from host - no method found (size=%u)", length);
+
+	if(state == HTTPD_HEADERS){
+		parse_headers();
+		body_offset=length;
+	}
+}
+
+/* ********************************************************** */
+
+Array<ResponseHeaders::Header> &HTTPD_Connection::headers() {
+	return request->headers.headers;
+}
+
+const char *HTTPD_Connection::method() {
+	return request->method;
+}
+
+const char *HTTPD_Connection::uri() {
+	return request->uri;
+}
+
+const char *HTTPD_Connection::content_type() {
+	return request->headers.content_type.cstr();
+}
+
+uint64_t HTTPD_Connection::content_length(){
+	return request->headers.content_length;
+}
+
+void HTTPD_Connection::read_header(){
+	request = new HTTPD_request();
+	request->read_header(sock);
+}
+
+static int sock_on = 1;
+
+int HTTPD_Server::bind(const char *host, int port){
+	struct sockaddr_in me;
+
+	if(!set_addr(&me, host, port)){
+		if (host)
+			throw Exception("httpd.bind", 0, "can not resolve hostname \"%s\"", host);
+		me.sin_addr.s_addr=INADDR_ANY;
+	}
+
+	int sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP/*0*/);
+
+	if(sock < 0){
+		int no=pa_socks_errno();
+		throw Exception("httpd.bind", 0, "can not make socket: %s (%d)", pa_socks_strerr(no), no);
+	}
+
+	if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *)&sock_on, sizeof(sock_on)) ||
+	    setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (char *)&sock_on, sizeof(sock_on)) ||
+	    ::bind(sock, (struct sockaddr*)&me, sizeof(me)) ||
+	    listen(sock, 16)) {
+		close(sock);
+		int no = pa_socks_errno();
+		throw Exception("httpd.bind", 0, "can not bind socket: %s (%d)", pa_socks_strerr(no), no);
+	}
+	return sock;
+}
+
+int ready(int fd,int operation,int timeout_value){
+	struct timeval timeout = {0, timeout_value * 1000};
+	fd_set fds;
+	FD_ZERO(&fds);
+	FD_SET(fd, &fds);
+	switch (operation){
+		case 0: return select(fd + 1, &fds, NULL, NULL, &timeout)>0;  /* read */
+		case 1: return select(fd + 1, NULL, &fds, NULL, &timeout)>0;  /* write */
+		default: return select(fd + 1, &fds, &fds, NULL, &timeout)>0;  /* both */
+	}
+}
+
+
+HTTPD_Connection *HTTPD_Server::accept(int sock, int timeout_value) {
+
+	int ready = ::ready(sock, 0, timeout_value);
+	if (ready < 0) {
+		int no=pa_socks_errno();
+		if(no == EINTR)
+			return NULL;
+		throw Exception("httpd.accept", 0, "error waiting for connection: %s (%d)", pa_socks_strerr(no), no);
+	}
+	if (ready == 0) {
+		/* Timeout */
+		return NULL;
+	}
+
+	struct sockaddr_in addr;
+	unsigned int sock_addr_len = sizeof(struct sockaddr_in);
+	memset(&addr, 0, sock_addr_len);
+
+	int csock = ::accept(sock, (struct sockaddr *)&addr, &sock_addr_len);
+	if(csock == -1){
+		int no=pa_socks_errno();
+		throw Exception("httpd.accept", 0, "error accepting connection: %s (%d)", pa_socks_strerr(no), no);
+	}
+
+	return new HTTPD_Connection(csock, pa_strdup(inet_ntoa(addr.sin_addr)));
+}
+