Node.js调用fs.renameSync报错(Error: EXDEV, cross-device link not permitted)
在写一个文件上传的功能时候,调用fs.renameSync方法错误
出错代码所在如下:
functionupload(response,request){ console.log("uploadcalled"); varform=newformidable.IncomingForm(); console.log("abouttoparse"); form.parse(request,function(error,fields,files){ console.log("parsingdone"); fs.renameSync(files.upload.path,"./tmp/test.jpg"); response.writeHead(200,{"Content-Type":"text/html"}); response.write("receivedimage:
"); response.write(""); response.end(); }); }
大致分析后,预计是因为跨磁盘分区移动或操作文件会有权限问题。
下面提供两种解决办法:
方法一:
主要利用fs的createReadStream、createWriteSream和unlinkSync方法
具体代码如下:
functionupload(response,request){ console.log("uploadcalled"); varform=newformidable.IncomingForm(); console.log("abouttoparse"); form.parse(request,function(error,fields,files){ console.log("parsingdone"); //fs.renameSync(files.upload.path,"./tmp/test.jpg"); varreadStream=fs.createReadStream(files.upload.path); varwriteStream=fs.createWriteStream("./tmp/test.jpg"); readStream.pipe(writeStream); readStream.on('end',function(){ fs.unlinkSync(files.upload.path); }); response.writeHead(200,{"Content-Type":"text/html"}); response.write("receivedimage:
"); response.write(""); response.end(); }); }
PS:我用的node版本是0.10.69,如果使用的是0.6以下的版本,可以使用util.pump
相应代码只需将上面的代码中readStream.on处改成:(注意引入util模块)
util.pump(readStream,writeStream,function(){ fs.unlinkSync('files.upload.path'); });
方法二:
这种就简洁很多了
添加一个form.uploadDir='tmp'即可(写一个临时路径)
functionupload(response,request){ console.log("uploadcalled"); varform=newformidable.IncomingForm(); form.uploadDir='tmp'; console.log("abouttoparse"); form.parse(request,function(error,fields,files){ console.log("parsingdone"); fs.renameSync(files.upload.path,"./tmp/test.jpg"); response.writeHead(,{"Content-Type":"text/html"}); response.write("receivedimage:
"); response.write(""); response.end(); }); }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持毛票票。