--- parser3/src/main/pa_http.C 2017/01/23 09:33:02 1.78 +++ parser3/src/main/pa_http.C 2026/10/18 21:18:39 1.143 @@ -1,26 +1,24 @@ /** @file Parser: http support functions. - Copyright (c) 2001-2015 Art. Lebedev Studio (http://www.artlebedev.com) - Author: Alexandr Petrosian (http://paf.design.ru) + Copyright (c) 2001-2026 Art. Lebedev Studio (https://www.artlebedev.com) + Authors: Konstantin Morshnev , Alexandr Petrosian */ #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 1.78 2017/01/23 09:33:02 moko Exp $" IDENT_PA_HTTP_H; - -#ifdef _MSC_VER -#include -#else -#define closesocket close +#ifndef WIN32 +#include // for TCP_NODELAY #endif +volatile const char * IDENT_PA_HTTP_C="$Id: pa_http.C,v 1.143 2026/10/18 21:18:39 moko Exp $" IDENT_PA_HTTP_H; + // defines #define HTTP_METHOD_NAME "method" @@ -45,19 +43,62 @@ volatile const char * IDENT_PA_HTTP_C="$ #undef CRLF #define CRLF "\r\n" +#define HTTP_TIMEOUT_COMMENT "timeout occurred while retrieving document" + // helpers -bool ResponseHeaders::add_header(const char *line){ +#ifdef HTTPD_DEBUG +void pa_log(const char* fmt, ...); +#define LOG(action) action +#else +#define LOG(action) +#endif + +ssize_t pa_send(int sock, const char *buffer, size_t len){ + size_t total_sent = 0; + while (total_sent < len) { + ssize_t bytes_sent=pa_sock_send(sock, buffer + total_sent, len - total_sent); + if (bytes_sent < 0) { + return bytes_sent; + } else if (bytes_sent == 0) { + // Connection closed by the remote peer? + break; + } + LOG( + if(bytes_sent != len - total_sent) + pa_log("httpd [%d] partial send %d of (%d)", sock, bytes_sent, len - total_sent) + ); + total_sent += bytes_sent; + } + return total_sent; +} + +// socket operation failed on SO_*TIMEO timeout +static bool sock_timed_out(int no){ +#ifdef WIN32 + return no==WSAETIMEDOUT; +#else + return no==EAGAIN || no==EWOULDBLOCK || no==EINPROGRESS /* connect on linux */; +#endif +} + +static int check_socket_timeout(int no){ + if(sock_timed_out(no)) + throw Exception("http.timeout", 0, HTTP_TIMEOUT_COMMENT); + return no; +} + +bool HTTP_Headers::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")); + Header header = Header(String::Body(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); + ALTER_EXCEPTION_COMMENT(content_length=pa_atoul(header.value.cstr()), " for content-length"); headers+=header; @@ -95,32 +136,31 @@ static bool set_addr(struct sockaddr_in return false; } -class HTTP_response { +class HTTP_response : public PA_Allocated { public: char *buf; size_t length; size_t buf_size; size_t body_offset; - ResponseHeaders headers; - String &url; + HTTP_Headers headers; - HTTP_response(String& aurl) : buf(NULL), length(0), buf_size(0), body_offset(0), url(aurl){} + HTTP_response() : buf(NULL), length(0), buf_size(0), body_offset(0){} void resize(size_t size){ buf_size=size; buf=(char *)pa_realloc(buf, size + 1); } - 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) + bool read(SOCKET sock, size_t size){ + if(length + size > buf_size) + resize(buf_size * 2 + size); + ssize_t received_size=pa_sock_recv(sock, buf + length, size); + 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); + if(received_size < 0) { + if(int no = check_socket_timeout(pa_socks_errno())) + throw Exception("http.timeout", 0, "error receiving response: %s (%d)", pa_socks_strerr(no), no); return false; } length+=received_size; @@ -128,12 +168,12 @@ public: return true; } - size_t status_size(){ - char *headers=strchr(buf, '\n'); - if(!headers) + size_t first_line(){ + char *header=strchr(buf, '\n'); + if(!header) return false; - return headers-buf; + return header-buf; } const char *status_code(char *status_line, int &result){ @@ -151,7 +191,7 @@ public: return status_line; const char *result_str=pa_strdup(status_start, status_end-status_start); - result=atoi(result_str); + ALTER_EXCEPTION_COMMENT(result=pa_atoui(result_str), " for HTTP status"); return result_str; } @@ -179,15 +219,16 @@ public: ArrayString aheaders; header_block.split(aheaders, 0, "\n"); - Array_iterator i(aheaders); + ArrayString::Iterator i(aheaders); i.next(); // skipping status - for(;i.has_next();){ + for(;i;){ const char *line=i.next()->cstr(); if(!headers.add_header(line)) - throw Exception("http.response", &url, "bad response from host - bad header \"%s\"", line); + throw Exception("http.response", 0, "bad response from host - bad header \"%s\"", line); } } + int read_response(SOCKET sock, bool fail_on_status_ne_200); }; enum HTTP_response_state { @@ -196,21 +237,21 @@ enum HTTP_response_state { HTTP_BODY }; -static int http_read_response(HTTP_response& response, int sock, bool fail_on_status_ne_200) { +int HTTP_response::read_response(SOCKET 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); + resize(2*chunk_size); - while(response.read(sock, chunk_size)){ + while(read(sock, chunk_size)){ switch(state){ case HTTP_STATUS_CODE: { - size_t status_size=response.status_size(); + size_t status_size=first_line(); if(!status_size) break; - const char *status=response.status_code(pa_strdup(response.buf, status_size), result); + const char *status=status_code(pa_strdup(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"); @@ -219,14 +260,14 @@ static int http_read_response(HTTP_respo } case HTTP_HEADERS: { - if(!response.body_start()) + if(!body_start()) break; - response.parse_headers(); + 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); + size_t content_length=check_file_size(headers.content_length, 0); + if(content_length>0 && (content_length + body_offset) > length){ + resize(content_length + body_offset + 0x400*64); } state=HTTP_BODY; @@ -241,11 +282,11 @@ static int http_read_response(HTTP_respo } if(state==HTTP_STATUS_CODE) - throw Exception("http.response", &response.url, "bad response from host - no status found (size=%u)", response.length); + throw Exception("http.response", 0, "bad response from host - no status found (size=%u)", length); if(state==HTTP_HEADERS){ - response.parse_headers(); - response.body_offset=response.length; + parse_headers(); + body_offset=length; } return result; @@ -254,47 +295,62 @@ static int http_read_response(HTTP_respo /* ********************** request *************************** */ #if defined(SIGALRM) && defined(HAVE_SIGSETJMP) && defined(HAVE_SIGLONGJMP) -# define PA_USE_ALARM +# define PA_HAVE_ALARM #endif -#ifdef PA_USE_ALARM +#ifdef PA_HAVE_ALARM static sigjmp_buf timeout_env; static void timeout_handler(int /*sig*/){ - siglongjmp(timeout_env, 1); + siglongjmp(timeout_env, 1); } + +// alarm is per process, threads use SO_*TIMEO +#define PA_USE_ALARM (HTTPD_Server::mode != HTTPD_Server::MULTITHREADED) + +#define ALARM(value) if(PA_USE_ALARM) alarm(value) +#else +#define PA_USE_ALARM false +#define ALARM(value) +#endif + +// SO_*TIMEO can be defined in .h but not implemented in protocol, so errors are ignored +static void set_socket_timeout(SOCKET sock, int option, int timeout_secs){ +#ifdef WIN32 + int timeout=timeout_secs < INT_MAX/1000 ? timeout_secs*1000 : 0 /* infinite */; +#else + struct timeval timeout={timeout_secs, 0}; #endif + setsockopt(sock, SOL_SOCKET, option, (const char*)&timeout, sizeof(timeout)); +} 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 - 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"); + volatile SOCKET sock=INVALID_SOCKET; // to prevent makeing it register variable, because it will be clobbered by longjmp [thanks gcc warning] + +#ifdef PA_HAVE_ALARM + if(PA_USE_ALARM) signal(SIGALRM, timeout_handler); + if(PA_USE_ALARM && sigsetjmp(timeout_env, 1)) { + // duplicating closesocket to make code more simple for old compilers + if(sock != INVALID_SOCKET) + closesocket(sock); + throw Exception("http.timeout", 0, HTTP_TIMEOUT_COMMENT); return 0; // never - } else { - alarm(timeout_secs); + } else #endif + { + ALARM(timeout_secs); try { int result; 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, "cannot resolve hostname \"%s\"", host); - if((sock=socket(AF_INET, SOCK_STREAM, IPPROTO_TCP/*0*/))<0) { + if((sock=socket(AF_INET, SOCK_STREAM, IPPROTO_TCP/*0*/)) == INVALID_SOCKET) { 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, "cannot make socket: %s (%d)", pa_socks_strerr(no), no); } // To enable SO_DONTLINGER (that is, disable SO_LINGER) @@ -302,42 +358,32 @@ static int http_request(HTTP_response& r 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(!PA_USE_ALARM){ + set_socket_timeout(sock, SO_SNDTIMEO, timeout_secs); + set_socket_timeout(sock, SO_RCVTIMEO, timeout_secs); + } 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); + int no=check_socket_timeout(pa_socks_errno()); + throw Exception("http.connect", 0, "cannot 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(); + if(pa_send(sock, request, request_size) < 0) { + int no=check_socket_timeout(pa_socks_errno()); throw Exception("http.timeout", 0, "error sending request: %s (%d)", pa_socks_strerr(no), no); } - result=http_read_response(response, sock, fail_on_status_ne_200); + result=response.read_response(sock, fail_on_status_ne_200); closesocket(sock); -#ifdef PA_USE_ALARM - alarm(0); -#endif + ALARM(0); return result; } catch(...) { -#ifdef PA_USE_ALARM - alarm(0); -#endif - if(sock>=0) + ALARM(0); + if(sock != INVALID_SOCKET) closesocket(sock); rethrow; } -#ifdef PA_USE_ALARM } -#endif } #ifndef DOXYGEN @@ -362,9 +408,7 @@ char *pa_http_safe_header_name(const cha return result; } -static void http_pass_header(HashStringValue::key_type aname, - HashStringValue::value_type avalue, - Http_pass_header_info *info) { +static void http_pass_header(HashStringValue::key_type aname, HashStringValue::value_type avalue, Http_pass_header_info *info) { const char* name_cstr=aname.cstr(); @@ -406,7 +450,7 @@ static const String* basic_authorization combined<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()) +static bool form_element_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()) { + } else if(VFile* vfile=dynamic_cast(value)){ + form_file_value2part(key, *vfile, part); + } else { + return false; + } + return true; +} + +static void form_value2part(HashStringValue::key_type key, HashStringValue::value_type value, FormPart& part) { + if(form_element_value2part(key, value, part)) { + // string or file + } 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(value->as("file"))){ - form_file_value2part(key, *vfile, part); + } else if(HashStringValue* hvalue=value->get_hash()){ + // hash or array: several strings/files under the same field name + for(HashStringValue::Iterator j(*hvalue); j; j.next()) + if(!form_element_value2part(key, j.value(), part)) + throw Exception(PARSER_RUNTIME, new String(j.key(), String::L_TAINTED), "is %s, multiple values of " HTTP_FORM_NAME " field '%s' must be strings or files", j.value()->type(), key.cstr()); } 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 " field value can be string, table, file, hash or array", value->type()); } const char* pa_form2string_multipart(HashStringValue& form, Request& r, const char* boundary, size_t& post_size){ @@ -561,7 +619,8 @@ static ArrayString* parse_cookie(Request if(first_pair) { // name + value name=sname; - value=smeaning; + if(smeaning) + value=smeaning; first_pair=false; } else { const String& slower=sname->change_case(r.charsets.source(), String::CC_LOWER); @@ -604,7 +663,7 @@ static ArrayString* parse_cookie(Request Table* parse_cookies(Request& r, Table *cookies){ Table& result=*new Table(new Cookies_table_template_columns); - for(Array_iterator i(*cookies); i.has_next(); ) + for(Array_iterator i(*cookies); i; ) if(ArrayString* row=parse_cookie(r, *i.next()->get(0))) result+=row; @@ -713,7 +772,7 @@ 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 cannot use $." HTTP_FORM_ENCTYPE_NAME " option with method GET"); multipart=strcasecmp(encode, HTTP_CONTENT_TYPE_MULTIPART_FORMDATA)==0; @@ -723,10 +782,10 @@ File_read_http_result pa_internal_file_r 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 cannot 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 cannot use options $." HTTP_BODY_NAME " and $." HTTP_FORM_NAME " together"); } //preparing request @@ -745,7 +804,7 @@ File_read_http_result pa_internal_file_r 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; + pa_strncpy(host, current, sizeof(host)); char* host_uri=lsplit(host, '/'); uri=host_uri?current+(host_uri-1-host):"/"; char* port_cstr=lsplit(host, ':'); @@ -841,7 +900,7 @@ File_read_http_result pa_internal_file_r } if(request_body) - head << "Content-Length: " << format(post_size, "%u") << CRLF; + head << "Content-Length: " << pa_uitoa(post_size) << CRLF; head << CRLF; @@ -861,10 +920,11 @@ File_read_http_result pa_internal_file_r } - HTTP_response response(connect_string); + HTTP_response response; // sending request - int status_code=http_request(response, idna_host, port, request, request_size, timeout_secs, fail_on_status_ne_200); + int status_code; + ALTER_EXCEPTION_SOURCE(status_code=http_request(response, idna_host, port, request, request_size, timeout_secs, fail_on_status_ne_200), &connect_string); // processing results char* raw_body=response.buf + response.body_offset; @@ -872,7 +932,7 @@ File_read_http_result pa_internal_file_r result.headers=new HashStringValue; VHash* vtables=new VHash; - result.headers->put("tables", vtables); + HASH_PUT_CSTR(*result.headers, "tables", vtables); if (!real_remote_charset && !response.headers.content_type.is_empty()) real_remote_charset=detect_charset(response.headers.content_type.cstr()); @@ -883,8 +943,8 @@ File_read_http_result pa_internal_file_r if (!real_remote_charset) real_remote_charset=asked_remote_charset; // never null - for(Array_iterator i(response.headers.headers); i.has_next(); ){ - ResponseHeaders::Header header=i.next(); + for(Array_iterator i(response.headers.headers); i; ){ + HTTP_Headers::Header header=i.next(); header.transcode(*real_remote_charset, r.charsets.source()); @@ -895,8 +955,8 @@ File_read_http_result pa_internal_file_r } // filling $.cookies - if(Value *vcookies=vtables->hash().get("SET-COOKIE")) - result.headers->put(HTTP_COOKIES_NAME, new VTable(parse_cookies(r, vcookies->get_table()))); + if(vcookies=vtables->hash().get("SET-COOKIE")) + HASH_PUT_CSTR(*result.headers, HTTP_COOKIES_NAME, new VTable(parse_cookies(r, vcookies->get_table()))); // output response String::C real_body=String::C(raw_body, raw_body_size); @@ -915,3 +975,390 @@ File_read_http_result pa_internal_file_r return result; } + +/* ********************** httpd *************************** */ + +enum EscapeState { + Initial, + Default, + EscapeFirst, + EscapeSecond +}; + +static bool check_uri(const char *uri){ + EscapeState state=Initial; + uint escapedValue=0; + + const char *pattern="/../"; + const char *pos=pattern; + + while(*uri){ + uchar c=(uchar)*(uri++); + switch(state) { + case Initial: + if(c!='/') + return false; + state=Default; + break; + case Default: + if(c=='%'){ + state=EscapeFirst; + continue; + } + if(c=='?') + return true; + break; + case EscapeFirst: + if(isxdigit(c)){ + state=EscapeSecond; + escapedValue=hex_value[c] << 4; + continue; + } + return false; + case EscapeSecond: + if(isxdigit(c)){ + state=Default; + c=(uchar)(escapedValue + hex_value[c]); + + // implementing Apache AllowEncodedSlashes Off just in case + if(c=='/' || c=='\\') + return false; + + break; + } + return false; + } + + if(c==*pos || c=='\\' && *pos=='/'){ + if(!*(++pos)) + return false; + } else { + pos=pattern; + } + } + return true; +} + +class HTTPD_request : public HTTP_response { +public: + const char *method; + const char *uri; + + HTTPD_request() : HTTP_response(), method(NULL), uri(NULL){}; + + ssize_t pa_recv(SOCKET sockfd, char *buf, size_t len); + + bool read(SOCKET sock, size_t size){ + if(length + size > buf_size) + resize(buf_size * 2 + size); + ssize_t received_size=pa_recv(sock, buf + length, size); + if(received_size == 0) + return false; + if(received_size < 0) { + if(int no = pa_socks_errno()) + throw Exception("httpd.read", 0, "error receiving request: %s (%d)", pa_socks_strerr(no), no); + return false; + } + length+=received_size; + buf[length]='\0'; + return true; + } + + 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); + if(!check_uri(uri)) + throw Exception("httpd.request", 0, "invalid uri '%s'", uri); + + return str_upper(method_line, uri_start-method_line); + } + + + bool read_header(SOCKET); + size_t read_post(SOCKET, char *, size_t); +}; + +enum HTTPD_request_state { + HTTPD_METHOD, + HTTPD_HEADERS +}; + +// timeout on "void" connection is normal +#define PA_RECV_TIMEOUT \ + LOG(pa_log("httpd [%d] recv got %d sec timeout", sockfd, pa_httpd_timeout)); \ + if(length) \ + throw Exception("httpd.timeout", 0, "timeout occurred while receiving request"); \ + return 0; + +ssize_t HTTPD_request::pa_recv(SOCKET sockfd, char *buffer, size_t len){ + LOG(pa_log("httpd [%d] recv %d appending to %d ...", sockfd, len, length)); + +#ifdef PA_HAVE_ALARM + if(PA_USE_ALARM) signal(SIGALRM, timeout_handler); + if(PA_USE_ALARM && sigsetjmp(timeout_env, 1)) { + PA_RECV_TIMEOUT + } else +#endif + { + ALARM(pa_httpd_timeout); + ssize_t result=pa_sock_recv(sockfd, buffer, len); + ALARM(0); + if(result < 0 && sock_timed_out(pa_socks_errno())) { + PA_RECV_TIMEOUT + } + LOG(pa_log("httpd [%d] recv got %d bytes", sockfd, result)); + LOG(pa_log("httpd [%d] %s", sockfd, buffer)); + return result; + } +} + +static bool valid_http_method(const char * method){ + return method && ( + !strcmp(method, "GET") || + !strcmp(method, "HEAD") || + !strcmp(method, "POST") || + !strcmp(method, "PUT") || + !strcmp(method, "DELETE") || + !strcmp(method, "CONNECT") || + !strcmp(method, "OPTIONS") || + !strcmp(method, "TRACE") || + !strcmp(method, "PATCH") + ); +} + +bool HTTPD_request::read_header(SOCKET 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(!valid_http_method(method)) + 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 true; + } + } + } + + if(!length){ // browsers open connections in advance and they will be empty unless user requests more pages + LOG(pa_log("httpd [%d] void request", sock)); + return false; + } + + 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; + } + + return true; +} + +size_t HTTPD_request::read_post(SOCKET sock, char *body, size_t max_bytes) { + size_t total_read = min(length - body_offset, max_bytes); + memcpy(body, buf + body_offset, total_read); + + while (total_read < max_bytes){ + ssize_t received_size = pa_recv(sock, body + total_read, max_bytes - total_read); + if(received_size == 0) + return total_read; + if(received_size < 0) { + if(int no = pa_socks_errno()) + throw Exception("httpd.read", new String(uri), "error receiving request body: %s (%d)", pa_socks_strerr(no), no); + return total_read; + } + total_read += received_size; + } + return total_read; +} + +/* ********************************************************** */ + +Array &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; +} + +bool HTTPD_Connection::read_header(){ + request = new HTTPD_request(); + bool result = request->read_header(sock); + LOG(if(result){ + pa_log("httpd [%d] got %s \"%s\"", sock, method(), uri()); + }) + return result; +} + +size_t HTTPD_Connection::read_post(char *body, size_t max_bytes) { + return request->read_post(sock, body, max_bytes); +} + +size_t HTTPD_Connection::send_body(const void *buf, size_t size) { + LOG(pa_log("httpd [%d] response %d bytes", sock, size)); + LOG(pa_log("httpd [%d] %s", sock, buf)); + ssize_t result=pa_send(sock, (const char*)buf, size); + if(result < 0) { + int no=pa_socks_errno(); + throw Exception("httpd.write", 0, "error sending response: %s (%d)", pa_socks_strerr(no), no); + } + return result; +} + +String::C HTTPD_Connection::unprocessed() { + return String::C(request->buf + request->body_offset, request->length - request->body_offset); +} + +size_t HTTPD_Connection::receive(char *dest, size_t max_bytes) { + ssize_t received_size=pa_sock_recv(sock, dest, max_bytes); + if(received_size < 0) { + int no=pa_socks_errno(); + if(pa_socks_is_reset(no)) + return 0; + throw Exception("httpd.read", 0, "error receiving data: %s (%d)", pa_socks_strerr(no), no); + } + return received_size; +} + +void HTTPD_Connection::set_nodelay() { + int nodelay=1; + setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (const char *)&nodelay, sizeof(nodelay)); +} + +void HTTPD_Connection::set_send_timeout(int timeout_secs) { + set_socket_timeout(sock, SO_SNDTIMEO, timeout_secs); +} + +HTTPD_Connection::~HTTPD_Connection(){ + if(sock != INVALID_SOCKET){ + LOG(pa_log("httpd [%d] closed", sock)); + closesocket(sock); + } +} + +bool HTTPD_Connection::accept(SOCKET server_sock, int timeout_value) { + int ready = pa_sock_ready(server_sock, false, timeout_value); + if (ready < 0) { + int no=pa_socks_errno(); + throw Exception("httpd.accept", 0, "error waiting for connection: %s (%d)", pa_socks_strerr(no), no); + } + if (ready == 0) + return false; /* Timeout */ + + struct sockaddr_in addr; + socklen_t sock_addr_len = sizeof(struct sockaddr_in); + memset(&addr, 0, sock_addr_len); + + sock = ::accept(server_sock, (struct sockaddr *)&addr, &sock_addr_len); + if(sock == INVALID_SOCKET){ + int no=pa_socks_errno(); + throw Exception("httpd.accept", 0, "error accepting connection: %s (%d)", pa_socks_strerr(no), no); + } + +// Has no positive performance effect, requires include +// static int sock_on=1; +// setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (char *)&sock_on, sizeof(sock_on)); + + if(!PA_USE_ALARM) + set_socket_timeout(sock, SO_RCVTIMEO, pa_httpd_timeout); + + remote_addr = pa_strdup(inet_ntoa(addr.sin_addr)); + LOG(pa_log("httpd [%d] accepted from %s", sock, remote_addr)); + return true; +} + +HTTPD_Server::HTTPD_MODE HTTPD_Server::mode = HTTPD_Server::SEQUENTIAL; +const char *HTTPD_Server::port=NULL; + +void HTTPD_Server::set_mode(const String &value){ + if(value == "sequental") mode = SEQUENTIAL; +#ifdef HAVE_TLS + else if (value == "threaded") mode = MULTITHREADED; +#endif +#ifdef _MSC_VER + else throw Exception("httpd.mode", &value, "$MAIN:HTTPD.mode must be 'sequental' or 'threaded'"); +#else + else if (value == "parallel") mode = PARALLEL; + else throw Exception("httpd.mode", &value, "$MAIN:HTTPD.mode must be 'sequental', 'parallel' or 'threaded'"); +#endif +} + +SOCKET HTTPD_Server::bind(const char *host_port){ + struct sockaddr_in me; + + port = strchr(host_port, ':'); + const char *host = NULL; + if(port){ + if(port > host_port) + host = pa_strdup(host_port, port - host_port); + port += 1; + } else { + port = host_port; + } + + if(!set_addr(&me, host, (short)pa_atoui(port))){ + if (host) + throw Exception("httpd.bind", 0, "cannot resolve hostname \"%s\"", host); + me.sin_addr.s_addr=INADDR_ANY; + } + + SOCKET sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP/*0*/); + + if(sock == INVALID_SOCKET){ + int no=pa_socks_errno(); + throw Exception("httpd.bind", 0, "cannot make socket: %s (%d)", pa_socks_strerr(no), no); + } + + static int sock_on = 1; + + 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, 511)) { // same default as in apache/nginx + closesocket(sock); + int no = pa_socks_errno(); + throw Exception("httpd.bind", 0, "cannot bind socket: %s (%d)", pa_socks_strerr(no), no); + } + return sock; +}