/*

    File:       OTSimpleServerHTTPTest.c

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

    Written by:     Quinn "The Eskimo!" 

    Copyright:  © Copyright 2001 Apple Computer, Inc. All rights reserved.

    Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple Computer, Inc.

                        ("Apple") in consideration of your agreement to the following terms, and your

                        use, installation, modification or redistribution of this Apple software

                        constitutes acceptance of these terms.  If you do not agree with these terms,

                        please do not use, install, modify or redistribute this Apple software.

                        In consideration of your agreement to abide by the following terms, and subject

                        to these terms, Apple grants you a personal, non-exclusive license, under AppleÕs

                        copyrights in this original Apple software (the "Apple Software"), to use,

                        reproduce, modify and redistribute the Apple Software, with or without

                        modifications, in source and/or binary forms; provided that if you redistribute

                        the Apple Software in its entirety and without modifications, you must retain

                        this notice and the following text and disclaimers in all such redistributions of

                        the Apple Software.  Neither the name, trademarks, service marks or logos of

                        Apple Computer, Inc. may be used to endorse or promote products derived from the

                        Apple Software without specific prior written permission from Apple.  Except as

                        expressly stated in this notice, no other rights or licenses, express or implied,

                        are granted by Apple herein, including but not limited to any patent rights that

                        may be infringed by your derivative works or by other works in which the Apple

                        Software may be incorporated.

                        The Apple Software is provided by Apple on an "AS IS" basis.  APPLE MAKES NO

                        WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED

                        WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR

                        PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN

                        COMBINATION WITH YOUR PRODUCTS.

                        IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR

                        CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE

                        GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

                        ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION

                        OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT

                        (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN

                        ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    Change History (most recent first):

                2/12/2001   MK      Carbonized and updated to CodeWarrior 6.1

                7/23/1999   Karl Groethe    Updated for Metrowerks Codewarror Pro 2.1

*/

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

// Carbon.h

#include <Carbon.h>

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

// Standard C prototypes.

#include <stdio.h>

#include <stdlib.h>

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

// Prototypes for the actual core HTTP server code.

#include "OTSimpleServerHTTP.h"

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

// Pick up SIOUXHandleOneEvent.

#ifndef __APPLE_CC__

#include <SIOUX.h>

#endif

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

// 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) );

}

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

ThreadEntryUPP gHTTPServerProcUPP;

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;

    ProcessInfoRec processInfo;

    ProcessSerialNumber PSN;

    Str255 infoName;

    // Get the IP address of this machine as a C string.

    OTInetHostToString(ipAddr, (char *)ipAddrString);

    CopyCStringToPascal(ipAddrString, ipAddrString);

    err = GetCurrentProcess(&PSN);

    processInfo.processAppSpec = &dirSpec;

    processInfo.processName = infoName;

    processInfo.processInfoLength = sizeof(processInfo);

    err = GetProcessInformation(&PSN, &processInfo);

    // Find the associated dirID, creatintg the directory

    // if necessary.

    (void) FSMakeFSSpec(dirSpec.vRefNum, dirSpec.parID, 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;

    if (gHTTPServerProcUPP == NULL)

    {

        gHTTPServerProcUPP = NewThreadEntryUPP((ThreadEntryProcPtr) HTTPServerProc);        

    }

    err = NewThread(kCooperativeThread,

                                        gHTTPServerProcUPP, (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 *) OTAllocMemInContext( numberOfSecondaryAddresses * sizeof(InetHost), NULL );

            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 = OTOpenEndpointInContext(OTCreateConfiguration("tcp"), 0, &epInfo, &err, NULL);

    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);

            MoreAssertQ(junk == noErr);

    }

    return (err);

}

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

int 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 = InitOpenTransportInContext(kInitOTForApplicationMask, NULL);

    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);

                                }

                        }

#ifndef __APPLE_CC__

                        (void) SIOUXHandleOneEvent(&event);

#endif

                        gLastCallWNE = TickCount();

                }

                junk = YieldToAnyThread();

                MoreAssertQ(junk == noErr);

            }

            CloseOpenTransportInContext(NULL);

    }

    if (err == noErr) {

            printf("Success.\n");

    } else {

            printf("Failed with error %d.\n", (int)err);

    }   

    printf("Done.  Press command-Q to Quit.\n");

    return err;

}