Displaying a URL's Properties

Given a URL reference, the displayProperties routine creates a propertyList array with one element for each of the twenty-one URL Access properties defined by Apple Computer. Then the routine gets the size of each property by calling URLGetPropertySize , gets the value of each property by calling URLGetProperty . and displays each property value.

Listing 2-13 Displaying the value of each URL property



 
void displayProperties( URLReference urlRef )

{

    OSErr err = noErr;

    int propCount = 0;

    const char* propertyList[21];

    Size propertySize = 0;

    Handle theProperty = nil;

    propertyList[0]  = kURLURL;

    propertyList[1]  = kURLResourceSize;

    propertyList[2]  = kURLLastModifiedTime;

    propertyList[3]  = kURLMIMEType;

    propertyList[4]  = kURLFileType;

    propertyList[5]  = kURLFileCreator;

    propertyList[6]  = kURLCharacterSet;

    propertyList[7]  = kURLResourceName;

    propertyList[8]  = kURLHost;

    propertyList[9]  = kURLAuthType;

    propertyList[10] = kURLUserName;

    propertyList[11] = kURLPassword;

    propertyList[12] = kURLStatusString;

    propertyList[13] = kURLIsSecure;

    propertyList[14] = kURLCertificate;

    propertyList[15] = kURLTotalItems;

    propertyList[16] = kURLHTTPRequestMethod;

    propertyList[17] = kURLHTTPRequestHeader;

    propertyList[18] = kURLHTTPRequestBody;

    propertyList[19] = kURLHTTPRespHeader;

    propertyList[20] = kURLHTTPUserAgent;



 

    // Get the size of each property, allocate a handle to store the

    // property's value, get the property value, and display it.

    for( propCount = 0; propCount < 21; propCount++)

    {

        // Get the size of the property's value.

        err = URLGetPropertySize(urlRef, propertyList[propCount], &propertySize);

        if(err != noErr) 

            printf("Error %d getting property size %s. Size returned 

                was: %d\n", err, propertyList[propCount], propertySize);

        else

            printf("Property size is %d: %s\n", propertySize);



 

        // Now get a handle for the property value.

        theProperty = NewHandleClear( propertySize + 1 );

        err = MemError();

        if(err != noErr) 

            printf("Error %d getting property handle %s\n", err, 

                propertyList[propCount]);

        else

            printf("Got handle for %s: %s\n", propertyList[propCount]);



 

        // Now get the property's value.

        err = URLGetProperty(urlRef, propertyList[propCount], 

                *theProperty, propertySize);

        if(err != noErr) 

            printf("Error %d getting property %s\n", err, propertyList[propCount]);

        else

            printf("Property %s: %s\n", propertyList[propCount], *theProperty);



 

        // Clean up.

        DisposeHandle(theProperty);

        printf("\n");

    }

    return;

}