Developer CD Series 2000 November: Tool Chest/Dev.CD Nov 00 TC Disk 1.toast/Sample Code/Networking/OTSimpleServerHTTP/OTSimpleServerHTTPTest.c

C/C++ Source or Header | 2000-09-28 | 10.3 KB | 355 lines | [TEXT/CWIE]

/*
    File:        OTSimpleServerHTTPTest.c

    Contains:    A test program for the simple HTTP server code.

    Written by: Quinn "The Eskimo!"

    Copyright:    Copyright © 1997-1999 by Apple Computer, Inc., All Rights Reserved.

                You may incorporate this Apple sample source code into your program(s) without
                restriction. This Apple sample source code has been provided "AS IS" and the
                responsibility for its operation is yours. You are not permitted to redistribute
                this Apple sample source code as "Apple sample source code" after having made
                changes. If you're going to re-distribute the source, we require that you make
                it clear in the source that the code was descended from Apple sample source
                code, but that you've made changes.

    Change History (most recent first):
                7/23/1999    Karl Groethe    Updated for Metrowerks Codewarror Pro 2.1


*/
#include <Files.h>
#include <TextUtils.h>
#include <Gestalt.h>
/////////////////////////////////////////////////////////////////////
// The OT debugging macros in <OTDebug.h> require this variable to
// be set.

#ifndef qDebug
#define qDebug    1
#endif

/////////////////////////////////////////////////////////////////////
// Pick up all the standard OT stuff.

#include <OpenTransport.h>

/////////////////////////////////////////////////////////////////////
// Pick up all the OT TCP/IP stuff.

#include <OpenTptInternet.h>

/////////////////////////////////////////////////////////////////////
// Pick up the OTDebugBreak and OTAssert macros.

#include <OTDebug.h>

/////////////////////////////////////////////////////////////////////
// Some common Mac OS prototypes.

#include <Threads.h>

/////////////////////////////////////////////////////////////////////
// Pick up SIOUXHandleOneEvent.

#include <SIOUX.h>

/////////////////////////////////////////////////////////////////////
// Standard C prototypes.

#include <stdio.h>
#include <stdlib.h>

/////////////////////////////////////////////////////////////////////
// Prototypes for the actual core HTTP server code.

#include "OTSimpleServerHTTP.h"

/////////////////////////////////////////////////////////////////////
// OTDebugStr is not defined in any OT header files, but it is
// exported by the libraries, so we define the prototype here.

extern pascal void OTDebugStr(const char* str);

/////////////////////////////////////////////////////////////////////
// The only way to tell whether OT supports IP single link
// multihoming is to check the version number.  The feature was
// added in OT 1.3.  The initialisation code sets
// gHaveIPSingleLinkMultihoming depending on the version number
// to avoid the rest of the code having to call Gestalt repeatedly.

enum
{
    kOTIPSingleLinkMultihomingVersion = 0x01300000
};

static Boolean gHaveIPSingleLinkMultihoming;

/////////////////////////////////////////////////////////////////////

// gLastCallWNE is used to throttle calls to wait next event so that
// we don't call it too often, which can be bad for system performance.

static UInt32 gLastCallWNE = 0;

// gRunningThreads contains the number of running HTTP listeners.
// We spool an HTTP listener for each IP address on the computer.
// Normally you would only spool one listener for the entire machine
// (listening on kOTAnyInetAddress), but we want to actively distinguish
// between each IP address so that we can server different information
// for each IP address.

static UInt32 gRunningThreads = 0;

/////////////////////////////////////////////////////////////////////

static OSErr FSpGetCatInfo(FSSpecPtr fss, short ioFDirIndex, CInfoPBPtr cpb)
    // A simple wrapper for GetCatInfo.
{
    cpb->hFileInfo.ioVRefNum = fss->vRefNum;
    cpb->hFileInfo.ioDirID = fss->parID;
    cpb->hFileInfo.ioNamePtr = fss->name;
    cpb->hFileInfo.ioFDirIndex = ioFDirIndex;
    return ( PBGetCatInfoSync(cpb) );
}

/////////////////////////////////////////////////////////////////////

static pascal OSStatus HTTPServerProc(InetHost ipAddr)
    // This routine is the main line of the thread that runs
    // an HTTP server.  ipAddr is the address on which the
    // server is listening.  Specify kOTAnyInetAddress to listen
    // on all active IP addresses simultaneously.
    //
    // The routine uses a directory whose name is the
    // dotted decimal string representation of ipAddr as the
    // root directory of the HTTP server.
{
    OSStatus err;
    Str255 ipAddrString;
    long rootVRefNum;
    long rootDirID;
    FSSpec dirSpec;
    CInfoPBRec cpb;

    // Get ipAddr as a dotted decimal Pascal string.
    OTInetHostToString(ipAddr, (char *) ipAddrString);
    C2PStr( (char *) ipAddrString);

    // Find the associated dirID, creatintg the directory
    // if necessary.

    (void) FSMakeFSSpec(0, 0, ipAddrString, &dirSpec);
    rootVRefNum = dirSpec.vRefNum;
    err = FSpGetCatInfo(&dirSpec, 0, &cpb);
    if (err == noErr && ( (cpb.hFileInfo.ioFlAttrib & (1 << 4)) != 0) ) {
        rootDirID = cpb.hFileInfo.ioDirID;
    } else {
        err = FSpDirCreate(&dirSpec, 0, &rootDirID);
    }

    // Start running an HTTP server on the IP address.  This
    // routine won't return under someone sets gQuitNow, which
    // is why we're calling it from a thread.

    if (err == noErr) {
        err = RunHTTPServer(ipAddr, rootVRefNum, rootDirID);
    }

    gRunningThreads -= 1;

    return (err);
}

/////////////////////////////////////////////////////////////////////

static OSStatus RunOneServer(InetHost ipAddr)
    // Runs a single HTTP server thread, serving the
    // given ipAddr.
{
    OSStatus err;
    ThreadID junkServerThread;

    err = NewThread(kCooperativeThread,
                        (ThreadEntryProcPtr) HTTPServerProc, (void *) ipAddr,
                        0, kCreateIfNeeded,
                        nil,
                        &junkServerThread);
    if (err == noErr) {
        gRunningThreads += 1;
    }

    return (err);
}

/////////////////////////////////////////////////////////////////////

static OSStatus RunServersForInterface(InetInterfaceInfo* interfaceInfo, SInt32 interfaceIndex)
    // Run HTTP servers for all of the IP addresses associated
    // with the interface denoted by interfaceInfo and interfaceIndex.
    // This routine first starts a server for the primary address
    // of the interface, then iterates through the secondary addresses on
    // the interface, starting a server thread for each one.
{
    OSStatus err;
    InetHost *secondaryAddressBuffer;
    UInt32   numberOfSecondaryAddresses;
    UInt32   addressIndex;

    secondaryAddressBuffer = nil;

    // First run the server for the interfaces primary address.

    err = RunOneServer(interfaceInfo->fAddress);

    // Now start a server for each of the interface's secondary
    // addresses.  This stuff can only be done on systems that
    // support IP single link multihoming.

    numberOfSecondaryAddresses = interfaceInfo->fIPSecondaryCount;

    if ( err == noErr && gHaveIPSingleLinkMultihoming && numberOfSecondaryAddresses > 0 ) {

        // Allocate a buffer for the secondary address info.

        secondaryAddressBuffer = (InetHost *) OTAllocMem( numberOfSecondaryAddresses * sizeof(InetHost) );
        if (secondaryAddressBuffer == nil) {
            err = kENOMEMErr;
        }

        // Ask OT for the list of secondary addresses on this interface.

        if (err == noErr) {
            err = OTInetGetSecondaryAddresses(secondaryAddressBuffer, &numberOfSecondaryAddresses, interfaceIndex);
        }

        // Start a server for each secondary address.

        addressIndex = 0;
        while (err == noErr && addressIndex < numberOfSecondaryAddresses) {
            err = RunOneServer(secondaryAddressBuffer[addressIndex]);
            if (err == noErr) {
                addressIndex += 1;
            }
        }
    }

    // Clean up.

    if (secondaryAddressBuffer != nil) {
        OTFreeMem(secondaryAddressBuffer);
    }

    return (err);
}

/////////////////////////////////////////////////////////////////////

static OSStatus RunAllHTTPServers(void)
    // Run HTTP servers for all of the IP addresses on the machine.
    // This routine iterates through the active Internet interfaces,
    // starting server threads for each active IP address on each
    // interface.
{
    OSStatus err;
    OSStatus junk;
    EndpointRef dummyEP;
    InetInterfaceInfo info;
    SInt32 interfaceIndex;
    Boolean done;
    TEndpointInfo epInfo;

    // Force TCP to load by creating a dummy endpoint.  Otherwise,
    // if we're the first TCP application to run, OTInetGetInterfaceInfo
    // will not return any active interfaces )-:

    dummyEP = OTOpenEndpoint(OTCreateConfiguration("tcp"), 0, &epInfo, &err);
    if (err == noErr) {

        // Iterate through the interfaces, starting HTTP servers on each.

        done = false;
        interfaceIndex = 0;
        do {
            done = ( OTInetGetInterfaceInfo(&info, interfaceIndex) != noErr );
            if ( ! done ) {
                err = RunServersForInterface(&info, interfaceIndex);
                interfaceIndex += 1;
            }
        } while (err == noErr && !done);
    }

    if (dummyEP != nil) {
        junk = OTCloseProvider(dummyEP);
        OTAssert("RunAllHTTPServers: Failed closing dummy endpoint", junk == noErr);
    }

    return (err);
}


/////////////////////////////////////////////////////////////////////

void main(void)
    // The main line of the application.  This routine performs
    // two functions.  At startup, it initialises the network and
    // starts HTTP servers on all the active IP addresses on the machine.
    // After that it goes into a loop calling WaitNextEvent and
    // waiting for all the listener threads to terminate.  Events
    // are handled by sending them to SIOUX, except when the user
    // presses 'q' the routine sets the gQuitNow boolean to force
    // all the server threads to terminate.
{
    OSStatus err;
    OSStatus junk;
    EventRecord event;
    NumVersionVariant otVersion;

    printf("OTSimpleServerHTTP!\n");
    printf("-- World's dumbest HTTP server.\n");
    printf("-- Press 'q' to stop the server.\n");
    printf("\n");

    gQuitNow = false;

    err = InitOpenTransport();
    if (err == noErr) {

        gHaveIPSingleLinkMultihoming = ( Gestalt(gestaltOpenTptVersions, (long *) &otVersion) == noErr
                                            && (otVersion.whole >= kOTIPSingleLinkMultihomingVersion ) );
        gRunningThreads = 0;

        err = RunAllHTTPServers();

        while ( gRunningThreads != 0 ) {
            if ( TickCount() > (gLastCallWNE + 3) ) {
                (void) WaitNextEvent(everyEvent, &event, 0, nil);
                if (event.what == keyDown) {
                    if ( (event.message & charCodeMask) == 'q' ) {
                        gQuitNow = true;
                        printf("Setting gQuitNow.\n");
                        fflush(stdout);
                    }
                }
                (void) SIOUXHandleOneEvent(&event);
                gLastCallWNE = TickCount();
            }
            junk = YieldToAnyThread();
            OTAssert("main: YieldToAnyThread failed", junk == noErr);
        }

        CloseOpenTransport();
    }

    if (err == noErr) {
        printf("Success.\n");
    } else {
        printf("Failed with error %d.\n", err);
    }
    printf("Done.  Press command-Q to Quit.\n");
}