Question

我有Buffer个base64个对象数组，我是根据jpg编码的图像字符串创建的，包含png和[ <Buffer 75 ab 5a 8a 66 a0 7b f8 e9 7a 06 da b1 ee b8 ff d8 ff e0 00 10 4a 46 49 46 00 01 02 00 00 01 00 01 00 00 ff db 00 43 00 03 02 02 03 02 02 03 03 03 03 ... >, <Buffer 75 ab 5a 8a 66 a0 7b f8 e9 7a 06 da b1 ee b8 ff d8 ff e0 00 10 4a 46 49 46 00 01 02 00 00 01 00 01 00 00 ff db 00 43 00 03 02 02 03 02 02 03 03 03 03 ... > ]个图像：

Node.js

我正在尝试使用gm库var currentGm = gm(images.shift()); for (var i=0; i<images.length; i++) { currentGm.append(images[i]); }将图像拼接在一起。

pipe

然后res将该数据jpg作为currentGm.stream('jpg').pipe(res);。

events.js:141
      throw er; // Unhandled 'error' event
      ^

Error: spawn gm ENOENT
    at exports._errnoException (util.js:856:11)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:178:32)
    at onErrorNT (internal/child_process.js:344:16)
    at nextTickCallbackWith2Args (node.js:478:9)
    at process._tickDomainCallback (node.js:433:17)

但是我收到了这个错误：

err

我尝试在stream回调中检查null，它是currentGm。

同样gm { domain: null, _events: {}, _eventsCount: 0, _maxListeners: undefined, _options: {}, data: {}, _in: [], _out: [], _outputFormat: null, _subCommand: 'convert', sourceBuffer: <Buffer 75 ab 5a 8a 66 a0 7b f8 e9 7a 06 da b1 ee b8 ff d8 ff e0 00 10 4a 46 49 46 00 01 02 00 00 01 00 01 00 00 ff db 00 43 00 03 02 02 03 02 02 03 03 03 03 ... >, source: 'unknown.jpg', _sourceFormatters: [ [Function] ] }看起来像这样：

stdout

来自回调的Socket { _connecting: false, _hadError: false, _handle: Pipe { _externalStream: {}, fd: 27, writeQueueSize: 0, owner: [Circular], onread: [Function: onread], reading: true }, _parent: null, _host: null, _readableState: ReadableState { objectMode: false, highWaterMark: 16384, buffer: [], length: 0, pipes: null, pipesCount: 0, flowing: null, ended: false, endEmitted: false, reading: true, sync: false, needReadable: true, emittedReadable: false, readableListening: false, defaultEncoding: 'utf8', ranOut: false, awaitDrain: 0, readingMore: false, decoder: null, encoding: null }, readable: true, domain: null, _events: { end: { [Function: g] listener: [Function: onend] }, finish: [Function: onSocketFinish], _socketEnd: [Function: onSocketEnd], close: [Function] }, _eventsCount: 4, _maxListeners: undefined, _writableState: WritableState { objectMode: false, highWaterMark: 16384, needDrain: false, ending: false, ended: false, finished: false, decodeStrings: false, defaultEncoding: 'utf8', length: 0, writing: false, corked: 0, sync: true, bufferProcessing: false, onwrite: [Function], writecb: null, writelen: 0, bufferedRequest: null, lastBufferedRequest: null, pendingcb: 0, prefinished: false, errorEmitted: false }, writable: false, allowHalfOpen: false, destroyed: false, bytesRead: 0, _bytesDispatched: 0, _sockname: null, _writev: null, _pendingData: null, _pendingEncoding: '' }对象如下所示：

{{1}}

Answer 1

在Mac OS X上，使用imagemagick安装brew解决了问题。

brew install imagemagick

和我的router：

var gm = require('gm').subClass({ imageMagick: true });

节点gm流出错

1 个答案: