情况:
从 Node.js(通过 Node 核心 HTTPS 模块)向 spring-boot Java API 提交多部分表单请求。该 API 需要两个表单数据元素:
“路线”
"file"
完整错误:
已处理的异常 - 主要异常:
org.springframework.web.multipart.MultipartException:无法解析多部分servlet请求;嵌套异常是 org.apache.commons.fileupload.FileUploadException:流意外结束
请求 header :
{"Accept":"*/*",
"cache-control":"no-cache",
"Content-Type":"multipart/form-data; boundary=2baac014-7974-49dd-ae87-7ce56c36c9e7",
"Content-Length":7621}
正在写入的表单数据(全部以二进制形式写入):
Content-Type: multipart/form-data; boundary=2baac014-7974-49dd-ae87-7ce56c36c9e7
--2baac014-7974-49dd-ae87-7ce56c36c9e7
Content-Disposition:form-data; name="route"
...our route object
--2baac014-7974-49dd-ae87-7ce56c36c9e7
Content-Disposition:form-data; name="files"; filename="somefile.xlsx"
Content-Type:application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
...excel file contents
--2baac014-7974-49dd-ae87-7ce56c36c9e7--
Node 代码:
let mdtHttpMultipart = (options, data = reqParam('data'), cb) => {
const boundaryUuid = getUuid()
, baseHeaders = {
'Accept': '*/*',
'cache-control': 'no-cache'
}
, composedHeaders = Object.assign({}, baseHeaders, options.headers)
;
options.path = checkPath(options.path);
let composedOptions = Object.assign({}, {
'host': getEdiHost(),
'path': buildPathFromObject(options.path, options.urlParams),
'method': options.method || 'GET',
'headers': composedHeaders,
'rejectUnauthorized': false
});
composedOptions.headers['Content-Type'] = `multipart/form-data; boundary=${boundaryUuid}`;
let multipartChunks = [];
let dumbTotal = 0;
let writePart = (_, encType = 'binary', skip = false) => {
if (!_) { return; }
let buf = Buffer.from(_, encType);
if (!skip) {dumbTotal += Buffer.byteLength(buf, encType);}
multipartChunks.push(buf);
};
writePart(`Content-Type: multipart/form-data; boundary=${boundaryUuid}\r\n\r\n`, 'binary', true)
writePart(`--${boundaryUuid}\r\n`)
writePart(`Content-Disposition:form-data; name="route"\r\n`)
writePart(JSON.stringify(data[0]) + '\r\n')
writePart(`--${boundaryUuid}\r\n`)
writePart(`Content-Disposition:form-data; name="files"; filename="${data[1].name}"\r\n`)
writePart(`Content-Type:${data[1].contentType}\r\n`)
writePart(data[1].contents + '\r\n')
writePart(`\r\n--${boundaryUuid}--\r\n`);
let multipartBuffer = Buffer.concat(multipartChunks);
composedOptions.headers['Content-Length'] = dumbTotal;
let request = https.request(composedOptions);
// on nextTick write multipart to request
process.nextTick(() => {
request.write(multipartBuffer, 'binary');
request.end();
});
// handle response
request.on('response', (httpRequestResponse) => {
let chunks = []
, errObject = handleHttpStatusCodes(httpRequestResponse);
;
if (errObject !== null) {
return cb(errObject, null);
}
httpRequestResponse.on('data', (chunk) => { chunks.push(chunk); });
httpRequestResponse.on('end', () => {
let responseString = Buffer.concat(chunks).toString()
;
return cb(null, JSON.parse(responseString));
});
});
request.on('error', (err) => cb(err));
};
根据规范,我们看不出 500 被抛出的任何原因。这里对格式进行了大量修改,但我们尚未正确实现结果。
旁注:它对我们使用 POSTMAN 有效,只是无法使用我们自己的应用程序服务器(我们实际构建 excel 文件的地方)让它工作。
任何帮助,即使只是尝试的想法,我们也将不胜感激。
最佳答案
试试这个:
let mdtHttpMultipart = (options, data = reqParam('data'), cb) => {
const boundaryUuid = getUuid()
, baseHeaders = {
'Accept': '*/*',
'cache-control': 'no-cache'
}
, composedHeaders = Object.assign({}, baseHeaders, options.headers)
;
let file = data[1]
let xlsx = file.contents
options.path = checkPath(options.path);
let composedOptions = Object.assign({}, {
'host': getEdiHost(),
'path': buildPathFromObject(options.path, options.urlParams),
'method': options.method || 'GET',
'headers': composedHeaders,
'rejectUnauthorized': false
});
let header = Buffer.from(`--${boundaryUuid}
Content-Disposition: form-data; name="route"
${JSON.stringify(data[0])})
--${boundaryUuid}
Content-Disposition: form-data; name="files"; filename="${file.name}"
Content-Type: ${file.contentType}
`.replace(/\r?\n */gm, '\r\n'))
let footer = Buffer.from(`\r\n--${boundaryUuid}--`)
let length = header.length + xlsx.length + footer.length
let body = Buffer.concat([header, xlsx, footer], length)
composedOptions.headers['Content-Length'] = length;
composedOptions.headers['Content-Type'] = `multipart/form-data; boundary=${boundaryUuid}`;
let request = https.request(composedOptions);
// handle response
request.on('response', (httpRequestResponse) => {
let chunks = []
, errObject = handleHttpStatusCodes(httpRequestResponse);
;
if (errObject !== null) {
return cb(errObject, null);
}
httpRequestResponse.on('data', (chunk) => { chunks.push(chunk); });
httpRequestResponse.on('end', () => {
let responseString = Buffer.concat(chunks).toString()
;
return cb(null, JSON.parse(responseString));
});
});
request.on('error', (err) => cb(err));
// write multipart to request
request.end(body);
};
关于node.js - org.springframework.web.multipart.MultipartException : Could not parse multipart servlet request. ..流意外结束,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/39173962/