AWS Lambda：errorMessage进程在完成请求之前退出

Question

我想从android客户端上传图像文件到服务器（服务器制作缩略图，并返回缩略图的url）。

然而，我塞进了这个错误消息。

{"errorMessage":"RequestId: 8e2a21b8-e62e-11e8-8585-d9b6fdfec9b9 Process exited before completing request"}!

我试着在stackoverflow中找到这个错误代码，但是我找不到Android的答案。

const AWS = require('aws-sdk');
const multipart = require("parse-multipart");
const s3 = new AWS.S3();
const bluebird = require('bluebird');

exports.handler = function(event, context) {
    let result = [];
    const bodyBuffer = new Buffer(event['body-json'].toString(), 'base64');
    const boundary = multipart.getBoundary(event.params.header['Content-Type']);
    const parts = multipart.Parse(bodyBuffer, boundary);
    const files = getFiles(parts);

    return bluebird.map(files, file => {
        console.log('UploadCall');
        return upload(file)
        .then(
            data => {
                result.push({
                    'bucket': data.Bucket,
                    'key': data.key,
                    'fileUrl': file.uploadFile.fullPath })
                console.log( `DATA => ${JSON.stringify(data, null, 2 )}`);
                },
                err => {
                    console.log(`S3 UPLOAD ERR => ${err}`);
                }
            )
        })
        .then(_=> {
            return context.succeed(result);
        });
    }

    let upload = function(file) {
        console.log('PutObject Call')
        return s3.upload(file.params).promise();
    };

    let getFiles = function(parts) {
    let files = [];
    parts.forEach(part => {
        const buffer = part.data

        const fileName = part.filename;
        const fileFullName = fileName;

        const originBucket = 'dna-edge/images';
        const filefullPath = `https://s3.ap-northeast-2.amazonaws.com/${originBucket}/${fileFullName}`;

        const params = {
            Bucket: originBucket,
            Key: fileFullName,
            Body: buffer
        };

        const uploadFile = {
            size: buffer.toString('ascii').length,
            type: part.type,
            name: fileName,
            fullPath: filefullPath
        };
        files.push({ params, uploadFile })
    });
    return files;
};

这是客户端代码（imgURL看起来像/storage/emulated/0/dcim/img/1493742568136.jpg)

public static String requestHttpPostLambda(String url, String imgURL){

    /*
     await axios.post(`${AWS_LAMBDA_API_URL}?type=${type}`, formData,
{ headers: { 'Content-Type': 'multipart/form-data' }})
.then((response) => {result = response});
     */
    String result=null;
    try {
        HttpClient client = new DefaultHttpClient();
        String postURL = url;
        HttpPost post = new HttpPost(postURL);
        post.setHeader("Content-Type", "multipart/form-data");

        File file = new File(imgURL);
        MultipartEntityBuilder builder = MultipartEntityBuilder.create();
        builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
        builder.addPart("image", new FileBody(file));
        post.setEntity(builder.build());

        HttpResponse responsePOST = client.execute(post);
        Log.e("HttpResponse", responsePOST.getStatusLine()+"");
        HttpEntity resEntity = responsePOST.getEntity();
        if (resEntity != null) {
            result = EntityUtils.toString(resEntity);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return result;
}

Answer 1

欢迎使用StackOverflow。

因此，由于某些原因，AWS不太好更新文档，不要使用context.success，使用作为第三个参数传递的回调。

另外，我将移到Node8.10运行时，因为您可以使用async/await而不是使用promissions/then模式。

export default(event, context, callback) => {

    try {

        // do some stuff

        callback(null, SOME_VALID_HTTP_RESPONSE)
    } catch(e){

        callback(e, null)
    }
}

callback(null, responder.success({someJson: someValue}))