来自 FSCopyURLForVolume 的完整 URL

Question

我在获取带有FSCopyURLForVolume 的文件的完整网址时遇到问题。我正在使用此问题中的代码Determine AFP share from a file URL，但它没有给我完整的网址。例如：

使用如下路径：/Volume/server/html/index.html

我得到的只是基本安装的网址：nfs://real_server_name/vol

叶子目录和文件名被省略了，完整路径在文件信息中可用，因此必须有一种方法来获取此信息。

编辑：

经过更多挖掘之后，我似乎想使用kFSCatInfoParentDirID 和kFSCatInfoNodeID 来获取父节点和节点（文件）ID，但我不确定如何将其变成有用的东西。

Answer 1

因为 FSPathMakeRef、FSGetCatalogInfo 和 FSCopyURLForVolume 已从 Mac OS X 10.8 中弃用，所以我对获取 Mac OS X 安装卷上的 UNC 网络路径的代码进行了现代化改造。

    NSError *error=nil; //Error 
    NSURL *volumePath=nil; //result of UNC network mounting path 

    NSString* testPath =@"/Volumes/SCAMBIO/testreport.exe"; //File path to test 

    NSURL *testUrl = [NSURL fileURLWithPath:testPath]; //Create a NSURL from file path
    NSString* mountPath = [testPath stringByDeletingLastPathComponent]; //Get only mounted volume part i.e. /Volumes/SCAMBIO
    NSString* pathComponents = [testPath substringFromIndex:[mountPath length]]; //Get the rest of the path starting after the mounted path i.e. /testereport.exe
   [testUrl getResourceValue:&volumePath forKey:NSURLVolumeURLForRemountingKey error:&error]; //Get real UNC network mounted path i.e. smb://....

    NSLog(@"Path: %@%@", volumePath,pathComponents); //Write result to debug console

结果是在我的情况下， 路径：smb://FRANCESCO@192.168.69.44/SCMBIO/testreport.exe

您需要指定网络映射卷。

ciao.

Answer 2

Apple Dev Forums 上提出了解决此问题的方法，这是我想出的最终功能：

- (NSURL *)volumeMountPathFromPath:(NSString *)path{
    NSString *mountPath = nil;
    NSString *testPath = [path copy];
    while(![testPath isEqualToString:@"/"]){
        NSURL *testUrl = [NSURL fileURLWithPath:testPath];
        NSNumber *isVolumeKey;
        [testUrl getResourceValue:&isVolumeKey forKey:NSURLIsVolumeKey error:nil];
        if([isVolumeKey boolValue]){
            mountPath = testPath;
            break;
        }        
        testPath = [testPath stringByDeletingLastPathComponent];
    }

    if(mountPath == nil){
        return nil;
    }

    NSString *pathCompointents = [path substringFromIndex:[mountPath length]];

    FSRef pathRef;
    FSPathMakeRef((UInt8*)[path fileSystemRepresentation], &pathRef, NULL);
    FSCatalogInfo catalogInfo;
    OSErr osErr = FSGetCatalogInfo(&pathRef, kFSCatInfoVolume|kFSCatInfoParentDirID,
                                   &catalogInfo, NULL, NULL, NULL);
    FSVolumeRefNum volumeRefNum = 0;
    if(osErr == noErr){
        volumeRefNum = catalogInfo.volume;
    }

    CFURLRef serverLocation;
    OSStatus result = FSCopyURLForVolume(volumeRefNum, &serverLocation);
    if(result == noErr){
        NSString *fullUrl = [NSString stringWithFormat:@"%@%@", 
                             CFURLGetString(serverLocation), pathCompointents];        
        return [NSURL URLWithString:fullUrl];
    }else{
        NSLog(@"Error getting the mount path: %i", result);
    }
    return nil;
}