root/sapi/isapi/stresstest/stresstest.cpp

/* [<][>][^][v][top][bottom][index][help] */

DEFINITIONS

This source file includes following definitions.
  1. stripcrlf
  2. CompareFiles
  3. CompareStringWithFile
  4. ReadGlobalEnvironment
  5. ReadFileList
  6. DoThreads
  7. DoFileList
  8. ParseTestFile
  9. GetTestFiles
  10. DeleteTempFiles
  11. DoTestFiles
  12. _usage
  13. main
  14. IsapiThread
  15. stress_main
  16. GetServerVariable
  17. ReadClient
  18. WriteClient
  19. ServerSupportFunction
  20. MakeDateStr
  21. FillExtensionControlBlock
  22. GetEnv

/*
 * ======================================================================= *
 * File: stress .c                                                         *
 * stress tester for isapi dll's                                           *
 * based on cgiwrap                                                        *
 * ======================================================================= *
 *
*/
#define WIN32_LEAN_AND_MEAN
#include <afx.h>
#include <afxtempl.h>
#include <winbase.h>
#include <winerror.h>
#include <httpext.h>
#include <stdio.h>
#include <stdlib.h>
#include "getopt.h"

// These are things that go out in the Response Header
//
#define HTTP_VER     "HTTP/1.0"
#define SERVER_VERSION "Http-Srv-Beta2/1.0"

//
// Simple wrappers for the heap APIS
//
#define xmalloc(s) HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (s))
#define xfree(s)   HeapFree(GetProcessHeap(), 0, (s))

//
// The mandatory exports from the ISAPI DLL
//
DWORD numThreads = 1;
DWORD iterations = 1;

HANDLE StartNow;
// quick and dirty environment
typedef CMapStringToString TEnvironment;
TEnvironment IsapiEnvironment;

typedef struct _TResults {
        LONG ok;
        LONG bad;
} TResults;

CStringArray IsapiFileList;  // list of filenames
CStringArray TestNames;      // --TEST--
CStringArray IsapiGetData;   // --GET--
CStringArray IsapiPostData;  // --POST--
CStringArray IsapiMatchData; // --EXPECT--
CArray<TResults, TResults> Results;

typedef struct _TIsapiContext {
        HANDLE in;
        HANDLE out;
        DWORD tid;
        TEnvironment env;
        HANDLE waitEvent;
} TIsapiContext;

//
// Prototypes of the functions this sample implements
//
extern "C" {
HINSTANCE hDll;
typedef BOOL (WINAPI *VersionProc)(HSE_VERSION_INFO *) ;
typedef DWORD (WINAPI *HttpExtProc)(EXTENSION_CONTROL_BLOCK *);
typedef BOOL (WINAPI *TerminateProc) (DWORD);
BOOL WINAPI FillExtensionControlBlock(EXTENSION_CONTROL_BLOCK *, TIsapiContext *) ;
BOOL WINAPI GetServerVariable(HCONN, LPSTR, LPVOID, LPDWORD );
BOOL WINAPI ReadClient(HCONN, LPVOID, LPDWORD);
BOOL WINAPI WriteClient(HCONN, LPVOID, LPDWORD, DWORD);
BOOL WINAPI ServerSupportFunction(HCONN, DWORD, LPVOID, LPDWORD, LPDWORD);
VersionProc IsapiGetExtensionVersion;
HttpExtProc IsapiHttpExtensionProc;
TerminateProc TerminateExtensionProc;
HSE_VERSION_INFO version_info;
}

char * MakeDateStr(VOID);
char * GetEnv(char *);




DWORD CALLBACK IsapiThread(void *);
int stress_main(const char *filename, 
                                const char *arg, 
                                const char *postfile, 
                                const char *matchdata);



BOOL bUseTestFiles = FALSE;
char temppath[MAX_PATH];

void stripcrlf(char *line)
{
        DWORD l = strlen(line)-1;
        if (line[l]==10 || line[l]==13) line[l]=0;
        l = strlen(line)-1;
        if (line[l]==10 || line[l]==13) line[l]=0;
}

#define COMPARE_BUF_SIZE        1024

BOOL CompareFiles(const char*f1, const char*f2)
{
        FILE *fp1, *fp2;
        bool retval;
        char buf1[COMPARE_BUF_SIZE], buf2[COMPARE_BUF_SIZE];
        int length1, length2;

        if ((fp1=fopen(f1, "r"))==NULL) {
                return FALSE;
        }

        if ((fp2=fopen(f2, "r"))==NULL) {
                fclose(fp1);
                return FALSE;
        }

        retval = TRUE; // success oriented
        while (true) {
                length1 = fread(buf1, 1, sizeof(buf1), fp1);
                length2 = fread(buf2, 1, sizeof(buf2), fp2);

                // check for end of file
                if (feof(fp1)) {
                        if (!feof(fp2)) {
                                retval = FALSE;
                        }
                        break;
                } else if (feof(fp2)) {
                        if (!feof(fp1)) {
                                retval = FALSE;
                        }
                        break;
                }

                // compare data
                if (length1!=length2
                        || memcmp(buf1, buf2, length1)!=0) {
                        retval = FALSE;
                        break;
                }
        }
        fclose(fp1);
        fclose(fp2);

        return retval;
}


BOOL CompareStringWithFile(const char *filename, const char *str, unsigned int str_length)
{
        FILE *fp;
        bool retval;
        char buf[COMPARE_BUF_SIZE];
        unsigned int offset=0, readbytes;
        fprintf(stderr, "test %s\n",filename);
        if ((fp=fopen(filename, "rb"))==NULL) {
                fprintf(stderr, "Error opening %s\n",filename);
                return FALSE;
        }

        retval = TRUE; // success oriented
        while (true) {
                readbytes = fread(buf, 1, sizeof(buf), fp);

                // check for end of file

                if (offset+readbytes > str_length
                        || memcmp(buf, str+offset, readbytes)!=NULL) {
                        fprintf(stderr, "File missmatch %s\n",filename);
                        retval = FALSE;
                        break;
                }
                if (feof(fp)) {
                        if (!retval) fprintf(stderr, "File zero length %s\n",filename);
                        break;
                }
        }
        fclose(fp);

        return retval;
}


BOOL ReadGlobalEnvironment(const char *environment)
{
        if (environment) {
        FILE *fp = fopen(environment, "r");
        DWORD i=0;
        if (fp) {
                char line[2048];
                while (fgets(line, sizeof(line)-1, fp)) {
                        // file.php arg1 arg2 etc.
                        char *p = strchr(line, '=');
                        if (p) {
                                *p=0;
                                IsapiEnvironment[line]=p+1;
                        }
                }
                fclose(fp);
                return IsapiEnvironment.GetCount() > 0;
        }
        }
        return FALSE;
}

BOOL ReadFileList(const char *filelist)
{
        FILE *fp = fopen(filelist, "r");
        if (!fp) {
                printf("Unable to open %s\r\n", filelist);
        }
        char line[2048];
        int i=0;
        while (fgets(line, sizeof(line)-1, fp)) {
                // file.php arg1 arg2 etc.
                stripcrlf(line);
                if (strlen(line)>3) {
                        char *p = strchr(line, ' ');
                        if (p) {
                                *p = 0;
                                // get file

                                IsapiFileList.Add(line);
                                IsapiGetData.Add(p+1);
                        } else {
                                // just a filename is all
                                IsapiFileList.Add(line);
                                IsapiGetData.Add("");
                        }
                }

                // future use
                IsapiPostData.Add("");
                IsapiMatchData.Add("");
                TestNames.Add("");

                i++;
        }
        Results.SetSize(TestNames.GetSize());

        fclose(fp);
        return IsapiFileList.GetSize() > 0;
}

void DoThreads() {

        if (IsapiFileList.GetSize() == 0) {
                printf("No Files to test\n");
                return;
        }

        printf("Starting Threads...\n");
        // loop creating threads
        DWORD tid;
        HANDLE *threads = new HANDLE[numThreads];
        DWORD i;
        for (i=0; i< numThreads; i++) {
                threads[i]=CreateThread(NULL, 0, IsapiThread, NULL, CREATE_SUSPENDED, &tid);
        }
        for (i=0; i< numThreads; i++) {
                if (threads[i]) ResumeThread(threads[i]);
        }
        // wait for threads to finish
        WaitForMultipleObjects(numThreads, threads, TRUE, INFINITE);
        for (i=0; i< numThreads; i++) {
                CloseHandle(threads[i]);
        }
        delete threads;
}

void DoFileList(const char *filelist, const char *environment)
{
        // read config files

        if (!ReadFileList(filelist)) {
                printf("No Files to test!\r\n");
                return;
        }

        ReadGlobalEnvironment(environment);

        DoThreads();
}


/**
 * ParseTestFile
 * parse a single phpt file and add it to the arrays
 */
BOOL ParseTestFile(const char *path, const char *fn)
{
        // parse the test file
        char filename[MAX_PATH];
        _snprintf(filename, sizeof(filename)-1, "%s\\%s", path, fn);
        char line[1024];
        memset(line, 0, sizeof(line));
        CString cTest, cSkipIf, cPost, cGet, cFile, cExpect;
        printf("Reading %s\r\n", filename);

        enum state {none, test, skipif, post, get, file, expect} parsestate = none;

        FILE *fp = fopen(filename, "rb");
        char *tn = _tempnam(temppath,"pht.");
        char *en = _tempnam(temppath,"exp.");
        FILE *ft = fopen(tn, "wb+");
        FILE *fe = fopen(en, "wb+");
        if (fp && ft && fe) {
                while (fgets(line, sizeof(line)-1, fp)) {
                        if (line[0]=='-') {
                                if (_strnicmp(line, "--TEST--", 8)==0) {
                                        parsestate = test;
                                        continue;
                                } else if (_strnicmp(line, "--SKIPIF--", 10)==0) {
                                        parsestate = skipif;
                                        continue;
                                } else if (_strnicmp(line, "--POST--", 8)==0) {
                                        parsestate = post;
                                        continue;
                                } else if (_strnicmp(line, "--GET--", 7)==0) {
                                        parsestate = get;
                                        continue;
                                } else if (_strnicmp(line, "--FILE--", 8)==0) {
                                        parsestate = file;
                                        continue;
                                } else if (_strnicmp(line, "--EXPECT--", 10)==0) {
                                        parsestate = expect;
                                        continue;
                                }
                        }
                        switch (parsestate) {
                        case test:
                                stripcrlf(line);
                                cTest = line;
                                break;
                        case skipif:
                                cSkipIf += line;
                                break;
                        case post:
                                cPost += line;
                                break;
                        case get:
                                cGet += line;
                                break;
                        case file:
                                fputs(line, ft);
                                break;
                        case expect:
                                fputs(line, fe);
                                break;
                        }
                }               

                fclose(fp);
                fclose(ft);
                fclose(fe);

                if (!cTest.IsEmpty()) {
                        IsapiFileList.Add(tn);
                        TestNames.Add(cTest);
                        IsapiGetData.Add(cGet);
                        IsapiPostData.Add(cPost);
                        IsapiMatchData.Add(en);
                        free(tn);
                        free(en);
                        return TRUE;
                }
        }
        free(tn);
        free(en);
        return FALSE;
}


/**
 * GetTestFiles
 * Recurse through the path and subdirectories, parse each phpt file
 */
BOOL GetTestFiles(const char *path)
{
        // find all files .phpt under testpath\tests
        char FindPath[MAX_PATH];
        WIN32_FIND_DATA fd;
        memset(&fd, 0, sizeof(WIN32_FIND_DATA));

        _snprintf(FindPath, sizeof(FindPath)-1, "%s\\*.*", path);
        HANDLE fh = FindFirstFile(FindPath, &fd);
        if (fh != INVALID_HANDLE_VALUE) {
                do {
                        if ((fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) &&
                                !strchr(fd.cFileName, '.')) {
                                // subdirectory, recurse into it
                                char NewFindPath[MAX_PATH];
                                _snprintf(NewFindPath, sizeof(NewFindPath)-1, "%s\\%s", path, fd.cFileName);
                                GetTestFiles(NewFindPath);
                        } else if (strstr(fd.cFileName, ".phpt")) {
                                // got test file, parse it now
                                if (ParseTestFile(path, fd.cFileName)) {
                                        printf("Test File Added: %s\\%s\r\n", path, fd.cFileName);
                                }
                        }
                        memset(&fd, 0, sizeof(WIN32_FIND_DATA));
                } while (FindNextFile(fh, &fd) != 0);
                FindClose(fh);
        }
        return IsapiFileList.GetSize() > 0;
}

void DeleteTempFiles(const char *mask)
{
        char FindPath[MAX_PATH];
        WIN32_FIND_DATA fd;
        memset(&fd, 0, sizeof(WIN32_FIND_DATA));

        _snprintf(FindPath, sizeof(FindPath)-1, "%s\\%s", temppath, mask);
        HANDLE fh = FindFirstFile(FindPath, &fd);
        if (fh != INVALID_HANDLE_VALUE) {
                do {
                        char NewFindPath[MAX_PATH];
                        _snprintf(NewFindPath, sizeof(NewFindPath)-1, "%s\\%s", temppath, fd.cFileName);
                        DeleteFile(NewFindPath);
                        memset(&fd, 0, sizeof(WIN32_FIND_DATA));
                } while (FindNextFile(fh, &fd) != 0);
                FindClose(fh);
        }
}

void DoTestFiles(const char *filelist, const char *environment)
{
        if (!GetTestFiles(filelist)) {
                printf("No Files to test!\r\n");
                return;
        }

        Results.SetSize(IsapiFileList.GetSize());

        ReadGlobalEnvironment(environment);

        DoThreads();

        printf("\r\nRESULTS:\r\n");
        // show results:
        DWORD r = Results.GetSize();
        for (DWORD i=0; i< r; i++) {
                TResults result = Results.GetAt(i);
                printf("%s\r\nOK: %d FAILED: %d\r\n", TestNames.GetAt(i), result.ok, result.bad);
        }

        // delete temp files
        printf("Deleting Temp Files\r\n");
        DeleteTempFiles("exp.*");
        DeleteTempFiles("pht.*");
        printf("Done\r\n");
}

#define OPTSTRING "m:f:d:h:t:i:"
static void _usage(char *argv0)
{
        char *prog;

        prog = strrchr(argv0, '/');
        if (prog) {
                prog++;
        } else {
                prog = "stresstest";
        }

        printf("Usage: %s -m <isapi.dll> -d|-l <file> [-t <numthreads>] [-i <numiterations>]\n"
                                "  -m             path to isapi dll\n"
                                "  -d <directory> php directory (to run php test files).\n"
                                "  -f <file>      file containing list of files to run\n"
                                "  -t             number of threads to use (default=1)\n"
                "  -i             number of iterations per thread (default=1)\n"
                                "  -h             This help\n", prog);
}
int main(int argc, char* argv[])
{
        LPVOID lpMsgBuf;
        char *filelist=NULL, *environment=NULL, *module=NULL;
        int c = NULL;
        while ((c=ap_getopt(argc, argv, OPTSTRING))!=-1) {
                switch (c) {
                        case 'd':
                                bUseTestFiles = TRUE;
                                filelist = strdup(ap_optarg);
                                break;
                        case 'f':
                                bUseTestFiles = FALSE;
                                filelist = strdup(ap_optarg);
                                break;
                        case 'e':
                                environment = strdup(ap_optarg);
                                break;
                        case 't':
                                numThreads = atoi(ap_optarg);
                                break;
                        case 'i':
                                iterations = atoi(ap_optarg);
                                break;
                        case 'm':
                                module = strdup(ap_optarg);
                                break;
                        case 'h':
                                _usage(argv[0]);
                                exit(0);
                                break;
                }
        }
        if (!module || !filelist) {
                _usage(argv[0]);
                exit(0);
        }

        GetTempPath(sizeof(temppath), temppath);
        hDll = LoadLibrary(module); // Load our DLL

        if (!hDll) {
                FormatMessage( 
                   FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
                    NULL,
                    GetLastError(),
                    MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
                    (LPTSTR) &lpMsgBuf,
                    0,
                    NULL 
                );
                fprintf(stderr,"Error: Dll 'php5isapi.dll' not found -%d\n%s\n", GetLastError(), lpMsgBuf);
                free (module);
                free(filelist);
                LocalFree( lpMsgBuf );
                return -1;
        }

        //
        // Find the exported functions

        IsapiGetExtensionVersion = (VersionProc)GetProcAddress(hDll,"GetExtensionVersion");
        if (!IsapiGetExtensionVersion) {
                fprintf(stderr,"Can't Get Extension Version %d\n", GetLastError());
                free (module);
                free(filelist);
                return -1;
        }
        IsapiHttpExtensionProc = (HttpExtProc)GetProcAddress(hDll,"HttpExtensionProc");
        if (!IsapiHttpExtensionProc) {
                fprintf(stderr,"Can't Get Extension proc %d\n", GetLastError());
                free (module);
                free(filelist);
                return -1;
        }
        TerminateExtensionProc = (TerminateProc) GetProcAddress(hDll, 
                                          "TerminateExtension");

        // This should really check if the version information matches what we
        // expect.
        //
        if (!IsapiGetExtensionVersion(&version_info) ) {
                fprintf(stderr,"Fatal: GetExtensionVersion failed\n");
                free (module);
                free(filelist);
                return -1;
        }

        if (bUseTestFiles) {
                char TestPath[MAX_PATH];
                if (filelist != NULL) 
                        _snprintf(TestPath, sizeof(TestPath)-1, "%s\\tests", filelist);
                else strcpy(TestPath, "tests");
                DoTestFiles(TestPath, environment);
        } else {
                DoFileList(filelist, environment);
        }

        // cleanup
        if (TerminateExtensionProc) TerminateExtensionProc(0);

        // We should really free memory (e.g., from GetEnv), but we'll be dead
        // soon enough

        FreeLibrary(hDll);
        free (module);
        free(filelist);
        return 0;
}


DWORD CALLBACK IsapiThread(void *p)
{
        DWORD filecount = IsapiFileList.GetSize();

        for (DWORD j=0; j<iterations; j++) {
                for (DWORD i=0; i<filecount; i++) {
                        // execute each file
                        CString testname = TestNames.GetAt(i);
                        BOOL ok = FALSE;
                        if (stress_main(IsapiFileList.GetAt(i), 
                                                IsapiGetData.GetAt(i), 
                                                IsapiPostData.GetAt(i),
                                                IsapiMatchData.GetAt(i))) {
                                InterlockedIncrement(&Results[i].ok);
                                ok = TRUE;
                        } else {
                                InterlockedIncrement(&Results[i].bad);
                                ok = FALSE;
                        }

                        if (testname.IsEmpty()) {
                                printf("Thread %d File %s\n", GetCurrentThreadId(), IsapiFileList.GetAt(i));
                        } else {
                                printf("tid %d: %s %s\n", GetCurrentThreadId(), testname, ok?"OK":"FAIL");
                        }
                        Sleep(10);
                }
        }
        printf("Thread ending...\n");
        return 0;
}

/*
 * ======================================================================= *
 * In the startup of this program, we look at our executable name and      *
 * replace the ".EXE" with ".DLL" to find the ISAPI DLL we need to load.   *
 * This means that the executable need only be given the same "name" as    *
 * the DLL to load. There is no recompilation required.                    *
 * ======================================================================= *
*/
BOOL stress_main(const char *filename, 
                                const char *arg, 
                                const char *postdata,
                                const char *matchdata) 
{

        EXTENSION_CONTROL_BLOCK ECB;
        DWORD rc;
        TIsapiContext context;

        // open output and input files
        context.tid = GetCurrentThreadId();
        CString fname;
        fname.Format("%08X.out", context.tid);

        context.out = CreateFile(fname, GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, FILE_FLAG_WRITE_THROUGH, NULL);
        if (context.out==INVALID_HANDLE_VALUE) {
                printf("failed to open output file %s\n", fname);
                return 0;
        }

        // not using post files
        context.in = INVALID_HANDLE_VALUE;

        //
        // Fill the ECB with the necessary information
        //
        if (!FillExtensionControlBlock(&ECB, &context) ) {
                fprintf(stderr,"Fill Ext Block Failed\n");
                return -1;
        }
        
        // check for command line argument, 
        // first arg = filename
        // this is added for testing php from command line

        context.env.RemoveAll();
        context.env["PATH_TRANSLATED"]= filename;
        context.env["SCRIPT_MAP"]= filename;
        context.env["CONTENT_TYPE"]= "";
        context.env["CONTENT_LENGTH"]= "";
        context.env["QUERY_STRING"]= arg;
        context.env["METHOD"]="GET";
        context.env["PATH_INFO"] = "";
        context.waitEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
        char buf[MAX_PATH];
        if (postdata && *postdata !=0) {
                ECB.cbAvailable = strlen(postdata);
                ECB.cbTotalBytes = ECB.cbAvailable;
                ECB.lpbData = (unsigned char *)postdata;
                context.env["METHOD"]="POST";

                _snprintf(buf, sizeof(buf)-1, "%d", ECB.cbTotalBytes);
                context.env["CONTENT_LENGTH"]=buf;

                context.env["CONTENT_TYPE"]="application/x-www-form-urlencoded";
        }
        ECB.lpszMethod = strdup(context.env["METHOD"]);
    ECB.lpszPathTranslated = strdup(filename);
        ECB.lpszQueryString = strdup(arg);
        ECB.lpszPathInfo = strdup(context.env["PATH_INFO"]);


        // Call the DLL
        //
        rc = IsapiHttpExtensionProc(&ECB);
        if (rc == HSE_STATUS_PENDING) {
                // We will exit in ServerSupportFunction
                WaitForSingleObject(context.waitEvent, INFINITE);
        }
        CloseHandle(context.waitEvent);
        //Sleep(75);
        free(ECB.lpszPathTranslated);
        free(ECB.lpszQueryString);
        free(ECB.lpszMethod);
        free(ECB.lpszPathInfo);

        BOOL ok = TRUE;

        if (context.out != INVALID_HANDLE_VALUE) CloseHandle(context.out);

        // compare the output with the EXPECT section
        if (matchdata && *matchdata != 0) {
                ok = CompareFiles(fname, matchdata);
        }

        DeleteFile(fname);

        return ok;
                
}
//
// GetServerVariable() is how the DLL calls the main program to figure out
// the environment variables it needs. This is a required function.
//
BOOL WINAPI GetServerVariable(HCONN hConn, LPSTR lpszVariableName,
                                                                LPVOID lpBuffer, LPDWORD lpdwSize){

        DWORD rc;
        CString value;
        TIsapiContext *c = (TIsapiContext *)hConn;
        if (!c) return FALSE;

        if (IsapiEnvironment.Lookup(lpszVariableName, value)) {
                rc = value.GetLength();
                strncpy((char *)lpBuffer, value, *lpdwSize-1);
        } else if (c->env.Lookup(lpszVariableName, value)) {
                rc = value.GetLength();
                strncpy((char *)lpBuffer, value, *lpdwSize-1);
        } else
                rc = GetEnvironmentVariable(lpszVariableName, (char *)lpBuffer, *lpdwSize) ;

        if (!rc) { // return of 0 indicates the variable was not found
                SetLastError(ERROR_NO_DATA);
                return FALSE;
        }

        if (rc > *lpdwSize) {
                SetLastError(ERROR_INSUFFICIENT_BUFFER);
                return FALSE;
        }

        *lpdwSize =rc + 1 ; // GetEnvironmentVariable does not count the NULL

        return TRUE;

}
//
// Again, we don't have an HCONN, so we simply wrap ReadClient() to
// ReadFile on stdin. The semantics of the two functions are the same
//
BOOL WINAPI ReadClient(HCONN hConn, LPVOID lpBuffer, LPDWORD lpdwSize) {
        TIsapiContext *c = (TIsapiContext *)hConn;
        if (!c) return FALSE;

        if (c->in != INVALID_HANDLE_VALUE) 
                return ReadFile(c->in, lpBuffer, (*lpdwSize), lpdwSize, NULL);

        return FALSE;
}
//
// ditto for WriteClient()
//
BOOL WINAPI WriteClient(HCONN hConn, LPVOID lpBuffer, LPDWORD lpdwSize,
                        DWORD dwReserved) {
        TIsapiContext *c = (TIsapiContext *)hConn;
        if (!c) return FALSE;

        if (c->out != INVALID_HANDLE_VALUE)
                return WriteFile(c->out, lpBuffer, *lpdwSize, lpdwSize, NULL);
        return FALSE;
}
//
// This is a special callback function used by the DLL for certain extra 
// functionality. Look at the API help for details.
//
BOOL WINAPI ServerSupportFunction(HCONN hConn, DWORD dwHSERequest,
                                LPVOID lpvBuffer, LPDWORD lpdwSize, LPDWORD lpdwDataType){

        TIsapiContext *c = (TIsapiContext *)hConn;
        char *lpszRespBuf;
        char * temp = NULL;
        DWORD dwBytes;
        BOOL bRet = TRUE;

        switch(dwHSERequest) {
                case (HSE_REQ_SEND_RESPONSE_HEADER) :
                        lpszRespBuf = (char *)xmalloc(*lpdwSize);//+ 80);//accomodate our header
                        if (!lpszRespBuf)
                                return FALSE;
                        wsprintf(lpszRespBuf,"%s",
                                //HTTP_VER,
                                
                                /* Default response is 200 Ok */

                                //lpvBuffer?lpvBuffer:"200 Ok",
                                
                                /* Create a string for the time. */
                                //temp=MakeDateStr(),

                                //SERVER_VERSION,
                                
                                /* If this exists, it is a pointer to a data buffer to
                                   be sent. */
                                lpdwDataType?(char *)lpdwDataType:NULL);

                        if (temp) xfree(temp);

                        dwBytes = strlen(lpszRespBuf);
                        bRet = WriteClient(0, lpszRespBuf, &dwBytes, 0);
                        xfree(lpszRespBuf);

                        break;
                        //
                        // A real server would do cleanup here
                case (HSE_REQ_DONE_WITH_SESSION):
                        SetEvent(c->waitEvent);
                        //ExitThread(0);
                        break;
                
                //
                // This sends a redirect (temporary) to the client.
                // The header construction is similar to RESPONSE_HEADER above.
                //
                case (HSE_REQ_SEND_URL_REDIRECT_RESP):
                        lpszRespBuf = (char *)xmalloc(*lpdwSize +80) ;
                        if (!lpszRespBuf)
                                return FALSE;
                        wsprintf(lpszRespBuf,"%s %s %s\r\n",
                                        HTTP_VER,
                                        "302 Moved Temporarily",
                                        (lpdwSize > 0)?lpvBuffer:0);
                        xfree(temp);
                        dwBytes = strlen(lpszRespBuf);
                        bRet = WriteClient(0, lpszRespBuf, &dwBytes, 0);
                        xfree(lpszRespBuf);
                        break;
                default:
                        return FALSE;
                break;
        }
        return bRet;
        
}
//
// Makes a string of the date and time from GetSystemTime().
// This is in UTC, as required by the HTTP spec.`
//
char * MakeDateStr(void){
        SYSTEMTIME systime;
        char *szDate= (char *)xmalloc(64);

        char * DaysofWeek[] = {"Sun","Mon","Tue","Wed","Thurs","Fri","Sat"};
        char * Months[] = {"NULL","Jan","Feb","Mar","Apr","May","Jun","Jul","Aug",
                                                "Sep","Oct","Nov","Dec"};

        GetSystemTime(&systime);

        wsprintf(szDate,"%s, %d %s %d %d:%d.%d", DaysofWeek[systime.wDayOfWeek],
                                                                          systime.wDay,
                                                                          Months[systime.wMonth],
                                                                          systime.wYear,
                                                                          systime.wHour, systime.wMinute,
                                                                          systime.wSecond );

        return szDate;
}
//
// Fill the ECB up 
//
BOOL WINAPI FillExtensionControlBlock(EXTENSION_CONTROL_BLOCK *ECB, TIsapiContext *context) {

        char * temp;
        ECB->cbSize = sizeof(EXTENSION_CONTROL_BLOCK);
        ECB->dwVersion = MAKELONG(HSE_VERSION_MINOR, HSE_VERSION_MAJOR);
        ECB->ConnID = (void *)context;
        //
        // Pointers to the functions the DLL will call.
        //
        ECB->GetServerVariable = GetServerVariable;
        ECB->ReadClient  = ReadClient;
        ECB->WriteClient = WriteClient;
        ECB->ServerSupportFunction = ServerSupportFunction;

        //
        // Fill in the standard CGI environment variables
        //
        ECB->lpszMethod = GetEnv("REQUEST_METHOD");
        if (!ECB->lpszMethod) ECB->lpszMethod = "GET";

        ECB->lpszQueryString = GetEnv("QUERY_STRING");
        ECB->lpszPathInfo = GetEnv("PATH_INFO");
        ECB->lpszPathTranslated = GetEnv("PATH_TRANSLATED");
        ECB->cbTotalBytes=( (temp=GetEnv("CONTENT_LENGTH")) ? (atoi(temp)): 0);
        ECB->cbAvailable = 0;
        ECB->lpbData = (unsigned char *)"";
        ECB->lpszContentType = GetEnv("CONTENT_TYPE");
        return TRUE;

}

//
// Works like _getenv(), but uses win32 functions instead.
//
char *GetEnv(LPSTR lpszEnvVar)
{
        
        char *var, dummy;
        DWORD dwLen;

        if (!lpszEnvVar)
                return "";
        
        dwLen =GetEnvironmentVariable(lpszEnvVar, &dummy, 1);

        if (dwLen == 0)
                return "";
        
        var = (char *)xmalloc(dwLen);
        if (!var)
                return "";
        (void)GetEnvironmentVariable(lpszEnvVar, var, dwLen);

        return var;
}

/* [<][>][^][v][top][bottom][index][help] */