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|
/* Project nGenEx
Destroyer Studios LLC
Copyright © 1997-2004. All Rights Reserved.
SUBSYSTEM: NetEx.lib
FILE: HttpServer.cpp
AUTHOR: John DiCamillo
OVERVIEW
========
Network Server Pump for HTTP Server
*/
#include "MemDebug.h"
#include "HttpServer.h"
#include "NetLayer.h"
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
// +-------------------------------------------------------------------+
HttpServer::HttpServer(WORD port, int poolsize)
: NetServer(port, poolsize)
{
http_server_name = "Generic HttpServer 1.0";
}
HttpServer::~HttpServer()
{ }
// +--------------------------------------------------------------------+
Text
HttpServer::ProcessRequest(Text msg, const NetAddr& addr)
{
HttpRequest request(msg);
HttpResponse response;
request.SetClientAddr(addr);
switch (request.Method()) {
case HttpRequest::HTTP_GET:
if (DoGet(request, response))
return response;
case HttpRequest::HTTP_POST:
if (DoPost(request, response))
return response;
case HttpRequest::HTTP_HEAD:
if (DoHead(request, response))
return response;
}
return ErrorResponse();
}
// +--------------------------------------------------------------------+
Text
HttpServer::GetServerName()
{
return http_server_name;
}
void
HttpServer::SetServerName(const char* name)
{
http_server_name = name;
}
// +--------------------------------------------------------------------+
Text
HttpServer::DefaultResponse()
{
Text response = "HTTP/1.1 200 OK\nServer: ";
response += http_server_name;
response += "\nMIME-Version: 1.0\nContent-Type: text/html\nConnection: close\n\n";
return response;
}
Text
HttpServer::ErrorResponse()
{
Text response = "HTTP/1.1 500 Internal Server Error\nServer:";
response += http_server_name;
response += "\nMIME-Version: 1.0\nContent-Type: text/html\nConnection: close\n\n";
response += "<html><head><title>";
response += http_server_name;
response += " Error</title></head>\n";
response += "<body bgcolor=\"black\" text=\"white\">\n<h1>";
response += http_server_name;
response += "</h1>\n<p>Veruca... sweetheart... angel... I'm not a magician!\n";
response += "</body></html>\n\n";
return response;
}
// +--------------------------------------------------------------------+
bool
HttpServer::DoGet(HttpRequest& request, HttpResponse& response)
{
char buffer[1024];
Text content;
content = "<html><head><title>";
content += http_server_name;
content += "</title></head>\n";
content += "<body bgcolor=\"white\" text=\"black\">\n<h1>";
content += http_server_name;
content += "</h1>\n";
content += "<br><h3>Client Address:</h3><p>\n";
sprintf(buffer, "%d.%d.%d.%d:%d<br><br>\n",
client_addr.B1(),
client_addr.B2(),
client_addr.B3(),
client_addr.B4(),
client_addr.Port());
content += buffer;
content += "<h3>Request Method:</h3><p>\n";
switch (request.Method()) {
case HttpRequest::HTTP_GET:
content += "GET";
break;
case HttpRequest::HTTP_POST:
content += "POST";
break;
case HttpRequest::HTTP_HEAD:
content += "HEAD";
break;
default:
content += "(unsupported?)";
break;
}
content += "<br>\n";
content += "<br><h3>URI Requested:</h3><p>\n";
content += request.URI();
content += "<br>\n";
if (request.GetQuery().size() > 0) {
content += "<br><h3>Query Parameters:</h3>\n";
ListIter<HttpParam> q_iter = request.GetQuery();
while (++q_iter) {
HttpParam* q = q_iter.value();
sprintf(buffer, "<b>%s:</b> <i>%s</i><br>\n", q->name.data(), q->value.data());
content += buffer;
}
}
content += "<br><h3>Request Headers:</h3>\n";
ListIter<HttpParam> h_iter = request.GetHeaders();
while (++h_iter) {
HttpParam* h = h_iter.value();
sprintf(buffer, "<b>%s:</b> <i>%s</i><br>\n", h->name.data(), h->value.data());
content += buffer;
}
content += "</body></html>\n\n";
response.SetStatus(HttpResponse::SC_OK);
response.AddHeader("Server", http_server_name);
response.AddHeader("MIME-Version", "1.0");
response.AddHeader("Content-Type", "text/html");
response.SetContent(content);
return true;
}
// +--------------------------------------------------------------------+
bool
HttpServer::DoPost(HttpRequest& request, HttpResponse& response)
{
return DoGet(request, response);
}
// +--------------------------------------------------------------------+
bool
HttpServer::DoHead(HttpRequest& request, HttpResponse& response)
{
if (DoGet(request, response)) {
int len = response.Content().length();
char buffer[256];
sprintf(buffer, "%d", len);
response.SetHeader("Content-Length", buffer);
response.SetContent("");
return true;
}
return false;
}
// +--------------------------------------------------------------------+
// +--------------------------------------------------------------------+
// +--------------------------------------------------------------------+
HttpRequest::HttpRequest(const char* r)
: method(0)
{
if (r && *r)
ParseRequest(r);
}
HttpRequest::~HttpRequest()
{
query.destroy();
headers.destroy();
cookies.destroy();
}
// +--------------------------------------------------------------------+
void
HttpRequest::ParseRequest(Text request)
{
if (request.length() <= 8)
return;
const char* pReq = 0;
const char* pURI = 0;
const char* pQuery = 0;
switch (request[0]) {
case 'G':
if (request.indexOf("GET") == 0)
method = HTTP_GET;
break;
case 'P':
if (request.indexOf("POST") == 0)
method = HTTP_POST;
break;
case 'H':
if (request.indexOf("HEAD") == 0)
method = HTTP_HEAD;
break;
default:
break;
}
if (!method) return;
char buffer[1024];
int i = 0;
// save the request line:
pReq = request.data();
while (*pReq && *pReq != '\n')
buffer[i++] = *pReq++;
buffer[i] = 0;
request_line = buffer;
i = 0;
// find the URI:
pURI = request.data();
while (*pURI && !isspace(*pURI))
pURI++;
while (*pURI && isspace(*pURI))
pURI++;
// copy the URI and find the query string:
while (*pURI && *pURI != '?' && !isspace(*pURI)) {
buffer[i++] = *pURI++;
}
buffer[i] = 0;
uri = buffer;
pQuery = pURI;
// parse the query string:
if (*pQuery == '?') {
pQuery++;
while (*pQuery && !isspace(*pQuery)) {
char name_buf[1024];
char value_buf[1024];
i = 0;
while (*pQuery && *pQuery != '=' && !isspace(*pQuery))
name_buf[i++] = *pQuery++;
name_buf[i] = 0;
if (*pQuery == '=')
pQuery++;
i = 0;
while (*pQuery && *pQuery != '&' && !isspace(*pQuery))
value_buf[i++] = *pQuery++;
value_buf[i] = 0;
if (*pQuery == '&')
pQuery++;
HttpParam* param = new(__FILE__,__LINE__) HttpParam(name_buf, DecodeParam(value_buf));
if (param)
query.append(param);
}
}
// get the headers:
const char* p = request.data();
while (*p && *p != '\n')
p++;
if (*p == '\n') p++;
while (*p && *p != '\r' && *p != '\n') {
char name_buf[1024];
char value_buf[1024];
i = 0;
while (*p && *p != ':')
name_buf[i++] = *p++;
name_buf[i] = 0;
p++; // skip ':'
while (isspace(*p)) p++; // skip spaces
i = 0;
while (*p && *p != '\r' && *p != '\n') // read to end of header line
value_buf[i++] = *p++;
value_buf[i] = 0;
if (!stricmp(name_buf, "Cookie")) {
ParseCookie(value_buf);
}
else {
HttpParam* param = new(__FILE__,__LINE__) HttpParam(name_buf, value_buf);
if (param)
headers.append(param);
}
while (*p && *p != '\n')
p++;
if (*p == '\n') p++;
}
if (method == HTTP_POST && *p) {
while (*p == '\n' || *p == '\r')
p++;
content = *p;
pQuery = p;
while (*pQuery && !isspace(*pQuery)) {
char name_buf[1024];
char value_buf[1024];
i = 0;
while (*pQuery && *pQuery != '=' && !isspace(*pQuery))
name_buf[i++] = *pQuery++;
name_buf[i] = 0;
if (*pQuery == '=')
pQuery++;
i = 0;
while (*pQuery && *pQuery != '&' && !isspace(*pQuery))
value_buf[i++] = *pQuery++;
value_buf[i] = 0;
if (*pQuery == '&')
pQuery++;
HttpParam* param = new(__FILE__,__LINE__) HttpParam(name_buf, DecodeParam(value_buf));
if (param)
query.append(param);
}
}
}
void
HttpRequest::ParseCookie(const char* param)
{
const char* p = param;
while (p && *p) {
while (isspace(*p)) p++;
// just ignore reserved attributes
if (*p == '$') {
while (*p && !isspace(*p) && *p != ';') p++;
if (*p == ';')
p++;
}
// found a cookie!
else if (isalpha(*p)) {
char name[1024];
char data[1024];
char* d = name;
while (*p && *p != '=')
*d++ = *p++;
*d = 0;
if (*p == '=')
p++;
if (*p == '"')
p++;
d = data;
while (*p && *p != '"' && *p != ';')
*d++ = *p++;
*d = 0;
if (*p == '"')
p++;
if (*p == ';')
p++;
HttpParam* param = new(__FILE__,__LINE__) HttpParam(name, data);
if (param)
cookies.append(param);
}
// this shouldn't happen - abandon the parse
else {
return;
}
}
}
// +--------------------------------------------------------------------+
Text
HttpRequest::GetParam(const char* name)
{
ListIter<HttpParam> iter = query;
while (++iter) {
HttpParam* p = iter.value();
if (p->name == name)
return p->value;
}
return Text();
}
// +--------------------------------------------------------------------+
Text
HttpRequest::GetHeader(const char* name)
{
ListIter<HttpParam> iter = headers;
while (++iter) {
HttpParam* p = iter.value();
if (p->name == name)
return p->value;
}
return Text();
}
void
HttpRequest::SetHeader(const char* name, const char* value)
{
ListIter<HttpParam> iter = headers;
while (++iter) {
HttpParam* p = iter.value();
if (p->name == name) {
p->value = value;
return;
}
}
HttpParam* param = new(__FILE__,__LINE__) HttpParam(name, value);
if (param)
headers.append(param);
}
void
HttpRequest::AddHeader(const char* name, const char* value)
{
HttpParam* param = new(__FILE__,__LINE__) HttpParam(name, value);
if (param)
headers.append(param);
}
// +--------------------------------------------------------------------+
Text
HttpRequest::GetCookie(const char* name)
{
ListIter<HttpParam> iter = cookies;
while (++iter) {
HttpParam* p = iter.value();
if (p->name == name)
return p->value;
}
return Text();
}
void
HttpRequest::SetCookie(const char* name, const char* value)
{
ListIter<HttpParam> iter = cookies;
while (++iter) {
HttpParam* p = iter.value();
if (p->name == name) {
p->value = value;
return;
}
}
HttpParam* param = new(__FILE__,__LINE__) HttpParam(name, value);
if (param)
cookies.append(param);
}
void
HttpRequest::AddCookie(const char* name, const char* value)
{
HttpParam* param = new(__FILE__,__LINE__) HttpParam(name, value);
if (param)
cookies.append(param);
}
// +--------------------------------------------------------------------+
Text
HttpRequest::DecodeParam(const char* value)
{
if (!value || !*value) return "";
int size = strlen(value);
char val = 0;
char code[4];
char sbuf[256];
char* lbuf = 0;
char* dst = sbuf;
char* p = sbuf;
if (size > 255) {
lbuf = new(__FILE__,__LINE__) char[size+1];
dst = lbuf;
p = lbuf;
}
if (p) {
while (*value) {
switch (*value) {
default: *p++ = *value; break;
case '+': *p++ = ' '; break;
case '%':
value++;
code[0] = *value++;
code[1] = *value;
code[2] = 0;
val = (char) strtol(code, 0, 16);
*p++ = val;
break;
}
value++;
}
*p = 0;
}
Text result = dst;
if (lbuf)
delete [] lbuf;
return result;
}
// +--------------------------------------------------------------------+
Text
HttpRequest::EncodeParam(const char* value)
{
if (!value || !*value) return "";
int size = strlen(value);
char hex1 = 0;
char hex2 = 0;
char sbuf[1024];
char* lbuf = 0;
char* dst = sbuf;
char* p = sbuf;
if (size > 255) {
lbuf = new(__FILE__,__LINE__) char[4*size+1];
dst = lbuf;
p = lbuf;
}
if (p) {
while (*value) {
switch (*value) {
default: *p++ = *value; break;
case ' ': *p++ = '+'; break;
case '?': *p++ = '%'; *p++ = '3'; *p++ = 'F'; break;
case '&': *p++ = '%'; *p++ = '2'; *p++ = '6'; break;
case ':': *p++ = '%'; *p++ = '3'; *p++ = 'A'; break;
case '/': *p++ = '%'; *p++ = '2'; *p++ = 'F'; break;
case '\\': *p++ = '%'; *p++ = '5'; *p++ = 'C'; break;
case '%': *p++ = '%'; *p++ = '2'; *p++ = '5'; break;
case '|': *p++ = '%'; *p++ = '7'; *p++ = 'C'; break;
case '<': *p++ = '%'; *p++ = '3'; *p++ = 'C'; break;
case '>': *p++ = '%'; *p++ = '3'; *p++ = 'E'; break;
case '[': *p++ = '%'; *p++ = '5'; *p++ = 'B'; break;
case ']': *p++ = '%'; *p++ = '5'; *p++ = 'D'; break;
case '{': *p++ = '%'; *p++ = '7'; *p++ = 'B'; break;
case '}': *p++ = '%'; *p++ = '7'; *p++ = 'D'; break;
case '"': *p++ = '%'; *p++ = '2'; *p++ = '2'; break;
case '^': *p++ = '%'; *p++ = '5'; *p++ = 'E'; break;
case '`': *p++ = '%'; *p++ = '6'; *p++ = '0'; break;
case '\n': break;
case '\r': break;
case '\t': break;
}
value++;
}
*p = 0;
}
Text result = dst;
if (lbuf)
delete [] lbuf;
return result;
}
// +--------------------------------------------------------------------+
HttpRequest::operator Text()
{
Text response = request_line.data();
response += "\n";
for (int i = 0; i < headers.size(); i++) {
HttpParam* h = headers[i];
response += h->name;
response += ": ";
response += h->value;
response += "\n";
}
for (i = 0; i < cookies.size(); i++) {
HttpParam* c = cookies[i];
response += "Cookie: ";
response += c->name;
response += "=\"";
response += c->value;
response += "\"\n";
}
response += "Connection: close\n\n";
response += content;
return response;
}
// +--------------------------------------------------------------------+
// +--------------------------------------------------------------------+
// +--------------------------------------------------------------------+
HttpResponse::HttpResponse(int stat, const char* data)
: status(stat), content(data)
{ }
HttpResponse::HttpResponse(const char* r)
: status(0), content(r)
{
if (r && *r)
ParseResponse(r);
}
HttpResponse::~HttpResponse()
{
headers.destroy();
cookies.destroy();
}
// +--------------------------------------------------------------------+
HttpResponse::operator Text()
{
Text response;
switch (status) {
case SC_CONTINUE : response = "HTTP/1.1 100 Continue\n"; break;
case SC_SWITCHING_PROTOCOLS : response = "HTTP/1.1 101 Switching Protocols\n"; break;
case SC_OK : response = "HTTP/1.1 200 OK\n"; break;
case SC_CREATED : response = "HTTP/1.1 201 Created\n"; break;
case SC_ACCEPTED : response = "HTTP/1.1 202 Accepted\n"; break;
case SC_NON_AUTHORITATIVE : response = "HTTP/1.1 203 Non Authoritative\n"; break;
case SC_NO_CONTENT : response = "HTTP/1.1 204 No Content\n"; break;
case SC_RESET_CONTENT : response = "HTTP/1.1 205 Reset Content\n"; break;
case SC_PARTIAL_CONTENT : response = "HTTP/1.1 206 Partial Content\n"; break;
case SC_MULTIPLE_CHOICES : response = "HTTP/1.1 300 Multiple Choices\n"; break;
case SC_MOVED_PERMANENTLY : response = "HTTP/1.1 301 Moved Permanently\n"; break;
case SC_FOUND : response = "HTTP/1.1 302 Found\n"; break;
case SC_SEE_OTHER : response = "HTTP/1.1 303 See Other\n"; break;
case SC_NOT_MODIFIED : response = "HTTP/1.1 304 Not Modified\n"; break;
case SC_USE_PROXY : response = "HTTP/1.1 305 Use Proxy\n"; break;
case SC_TEMPORARY_REDIRECT : response = "HTTP/1.1 307 Temporary Redirect\n"; break;
case SC_BAD_REQUEST : response = "HTTP/1.1 400 Bad Request\n"; break;
case SC_UNAUTHORIZED : response = "HTTP/1.1 401 Unauthorized\n"; break;
case SC_PAYMENT_REQUIRED : response = "HTTP/1.1 402 Payment Required\n"; break;
case SC_FORBIDDEN : response = "HTTP/1.1 403 Forbidden\n"; break;
case SC_NOT_FOUND : response = "HTTP/1.1 404 Not Found\n"; break;
case SC_METHOD_NOT_ALLOWED : response = "HTTP/1.1 405 Method Not Allowed\n"; break;
case SC_NOT_ACCEPTABLE : response = "HTTP/1.1 406 Not Acceptable\n"; break;
case SC_PROXY_AUTH_REQ : response = "HTTP/1.1 407 Proxy Authorization Req\n"; break;
case SC_REQUEST_TIME_OUT : response = "HTTP/1.1 408 Request Timeout\n"; break;
case SC_CONFLICT : response = "HTTP/1.1 409 Conflict\n"; break;
case SC_GONE : response = "HTTP/1.1 410 Gone\n"; break;
case SC_LENGTH_REQUIRED : response = "HTTP/1.1 411 Length Required\n"; break;
default:
case SC_SERVER_ERROR : response = "HTTP/1.1 500 Internal Server Error\n"; break;
case SC_NOT_IMPLEMENTED : response = "HTTP/1.1 501 Not Implemented\n"; break;
case SC_BAD_GATEWAY : response = "HTTP/1.1 502 Bad Gateway\n"; break;
case SC_SERVICE_UNAVAILABLE : response = "HTTP/1.1 503 Service Unavailable\n"; break;
case SC_GATEWAY_TIMEOUT : response = "HTTP/1.1 504 Gateway Timeout\n"; break;
case SC_VERSION_NOT_SUPPORTED: response = "HTTP/1.1 505 HTTP Version Not Supported\n"; break;
}
SetHeader("Connection", "close");
char buffer[256];
if (content.length()) {
sprintf(buffer, "%d", content.length());
SetHeader("Content-Length", buffer);
}
for (int i = 0; i < cookies.size(); i++) {
HttpParam* cookie = cookies.at(i);
sprintf(buffer, "%s=\"%s\"; Version=\"1\"", cookie->name.data(), cookie->value.data());
AddHeader("Set-Cookie", buffer);
}
for (i = 0; i < headers.size(); i++) {
const HttpParam* p = headers.at(i);
sprintf(buffer, "%s: %s\n", p->name.data(), p->value.data());
response += buffer;
}
response += "\n";
response += content;
return response;
}
// +--------------------------------------------------------------------+
Text
HttpResponse::GetHeader(const char* name)
{
ListIter<HttpParam> iter = headers;
while (++iter) {
HttpParam* p = iter.value();
if (p->name == name)
return p->value;
}
return Text();
}
void
HttpResponse::SetHeader(const char* name, const char* value)
{
ListIter<HttpParam> iter = headers;
while (++iter) {
HttpParam* p = iter.value();
if (p->name == name) {
p->value = value;
return;
}
}
HttpParam* param = new(__FILE__,__LINE__) HttpParam(name, value);
if (param)
headers.append(param);
}
void
HttpResponse::AddHeader(const char* name, const char* value)
{
HttpParam* param = new(__FILE__,__LINE__) HttpParam(name, value);
if (param)
headers.append(param);
}
// +--------------------------------------------------------------------+
Text
HttpResponse::GetCookie(const char* name)
{
ListIter<HttpParam> iter = cookies;
while (++iter) {
HttpParam* p = iter.value();
if (p->name == name)
return p->value;
}
return Text();
}
void
HttpResponse::SetCookie(const char* name, const char* value)
{
ListIter<HttpParam> iter = cookies;
while (++iter) {
HttpParam* p = iter.value();
if (p->name == name) {
p->value = value;
return;
}
}
HttpParam* param = new(__FILE__,__LINE__) HttpParam(name, value);
if (param)
cookies.append(param);
}
void
HttpResponse::AddCookie(const char* name, const char* value)
{
HttpParam* param = new(__FILE__,__LINE__) HttpParam(name, value);
if (param)
cookies.append(param);
}
// +--------------------------------------------------------------------+
void
HttpResponse::SendRedirect(const char* url)
{
status = SC_TEMPORARY_REDIRECT;
SetHeader("Location", url);
}
// +--------------------------------------------------------------------+
void
HttpResponse::ParseResponse(Text response)
{
if (response.length() <= 12 || response.indexOf("HTTP/1.") != 0)
return;
const char* pStatus = response.data() + 9;
sscanf(pStatus, "%d", &status);
if (!status) return;
int i = 0;
// get the headers:
const char* p = response.data();
while (*p && *p != '\n')
p++;
if (*p == '\n') p++;
while (*p && *p != '\r' && *p != '\n') {
char name_buf[1024];
char value_buf[1024];
i = 0;
while (*p && *p != ':')
name_buf[i++] = *p++;
name_buf[i] = 0;
p++; // skip ':'
while (isspace(*p)) p++; // skip spaces
i = 0;
while (*p && *p != '\r' && *p != '\n') // read to end of header line
value_buf[i++] = *p++;
value_buf[i] = 0;
if (!stricmp(name_buf, "Set-Cookie")) {
ParseCookie(value_buf);
}
else {
HttpParam* param = new(__FILE__,__LINE__) HttpParam(name_buf, value_buf);
if (param)
headers.append(param);
}
while (*p && *p != '\n')
p++;
if (*p == '\n') p++;
}
if (*p == '\n') p++;
content = p;
}
void
HttpResponse::ParseCookie(const char* param)
{
const char* p = param;
while (p && *p) {
while (isspace(*p)) p++;
// just ignore reserved attributes
if (*p == '$') {
while (*p && !isspace(*p) && *p != ';') p++;
if (*p == ';')
p++;
}
// found a cookie!
else if (isalpha(*p)) {
char name[1024];
char data[1024];
char* d = name;
while (*p && *p != '=')
*d++ = *p++;
*d = 0;
if (*p == '=')
p++;
if (*p == '"')
p++;
d = data;
while (*p && *p != '"' && *p != ';')
*d++ = *p++;
*d = 0;
if (*p == '"')
p++;
if (*p == ';')
p++;
// ignore the version attribute
if (stricmp(name, "version")) {
HttpParam* param = new(__FILE__,__LINE__) HttpParam(name, data);
if (param)
cookies.append(param);
}
}
// this shouldn't happen - abandon the parse
else {
return;
}
}
}
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