Java 从React/Node上载多部分文件时出现问题
我有以下JAVA控制器:Java 从React/Node上载多部分文件时出现问题,java,node.js,reactjs,spring-mvc,multipartform-data,Java,Node.js,Reactjs,Spring Mvc,Multipartform Data,我有以下JAVA控制器: @RequestMapping(value = "/data/upload", method = RequestMethod.POST) public @ResponseBody void uploadData(@RequestParam("file") MultipartFile file) throws IOException { logger.info("Receiv
@RequestMapping(value = "/data/upload", method = RequestMethod.POST)
public
@ResponseBody
void uploadData(@RequestParam("file") MultipartFile file) throws IOException {
logger.info("Received File for Ingestion");
dataUploadService.processData(file.getInputStream());
}
节点服务器端代码:
serviceCall(serviceCallRequestData, request, finalResponse) {
logger.info('Making remote request: ' + JSON.stringify(serviceCallRequestData));
let file = request.files['file']; // file: Object {name: "sample_aspect_review_upload.csv", encoding: "7bit", mimetype: "text/csv", mv: }
let formData = new FormData();
formData.append('file', Buffer.from(file.data));
fetch(serviceCallRequestData.url, {
method: serviceCallRequestData.requestObject.method,
headers: serviceCallRequestData.requestObject.headers,
body: formData
}).then(response => {
if (response.status !== 200) {
logger.error(`Error while making http call requestData: ${JSON.stringify(serviceCallRequestData)}`);
finalResponse.status(500).send('Internal server error');
return;
}
return response.json();
}).then((json) => {
logger.info(`Returning response for aspect-review-file-upload: ${JSON.stringify(json)}`);
finalResponse.status(200).send(JSON.stringify(json));
}).catch((e) => {
logger.error(`Error while making http call requestData: ${JSON.stringify(serviceCallRequestData)} error: ${JSON.stringify(e)}`);
finalResponse.status(500).send('Internal server error');
});
}
正在尝试上载csv文件,如:
"product_id","review_id","aspect_id","rating","confidence_score","indices"
"pid","rid","aid",1,0.851955,"[{\"s\":0,\"e\":114,\"highlights\":[39,68]}]"
邮递员很容易上传。请参见下面的屏幕截图:
在JAVA中获取错误:收到未知异常org.springframework.web.bind.MissingServletRequestParameterException:所需的多部分文件参数“file”不存在
当我不从React传递contentType标头时
在JAVA中获取错误:org.apache.commons.fileupload.FileUploadException:请求被拒绝,因为在我从React以“内容类型”传递contentType标头时未找到多部分边界::“多部分/表单数据”
JAVA dropwizard控制器的节点服务器端代码与:
@POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Produces(MediaType.APPLICATION_JSON)
public Response uploadFile(
@FormDataParam("file") InputStream inputStream,
@FormDataParam("file") FormDataContentDisposition fileDetail
) throws IOException {
logger.debug("Request to upload data file-name: {}", fileDetail.getName());
dataUploadService.processData(inputStream);
return Response.ok().build();
}
工作正常
我做错了什么?一些猜测:
使用={}
而不是@RequestParam
,您可以使用@RequestBody
注释:
@RequestMapping(value = "/data/upload", method = RequestMethod.POST,
consumes = {"multipart/mixed", "multipart/form-data"}
)
void uploadData(@RequestBody MultipartFile file) //body will be the whole JSON payload
或者更好地使用@RequestPart
,您可以在其中命名元素:
@RequestMapping(value = "/data/upload", method = RequestMethod.POST,
consumes = {"multipart/mixed", "multipart/form-data"}
)
void uploadData(@RequestPart (value="file") MultipartFile file) //gets file from JSON
FormData
的选项:
form.append('file', Buffer.from(file.data), {
filename: 'image1.jpg', // ... OR:
filepath: 'photos/image1.jpg',
contentType: 'image/jpeg',
knownLength: 19803
});
form.submit('http://example.com/', function(err, res) {
if (err) throw err;
console.log('Done');
});
您能否确认(使用类似于WireShark)从React发送的确切内容?从《邮差卷发》中,您可以看到以下命令:
curl -i -X POST -H "Content-Type:multipart/form-data" -F "file=@\"/pathto/sample.csv\";type=text/csv;filename=\"sample.csv\"" 'http://localhost:8080/data/upload'
所以我尝试添加type=text/csv;文件名=\“sample.csv\”
在表单数据中
因此,这应该是可行的:
let file = request.files['file'];
let formData = new FormData();
formData.append("file", Buffer.from(file.data), {
filename: file.name,
contentType: file.mimetype,
});
fetch(serviceCallRequestData.url, {
method: serviceCallRequestData.requestObject.method,
headers: serviceCallRequestData.requestObject.headers,
body: formData
}).then(response => {
if (response.status !== 200) {}
});
您正在从节点服务器发送哪些标头?您是否包含了
“内容类型”:“多部分/表单数据”
标题?@TarunLalwani:我已经清楚地提到了使用“内容类型”
标题发送数据时遇到的错误。我将当前答案视为后端所需的更改,您是否正在寻找前端代码的修复程序以使其正常工作,或者您正在评估是否也将更改后端作为一个选项?@TarunLalwani:更喜欢前端更改,因为当我从POSTMAN处点击它时,API没有问题。您能否在FE和BE之间放置一个socat
,并比较这两个请求?这并没有解决问题。在对POSTMAN的API进行了这些更改之后[@RequestPart]仍然有效,但在节点服务器上,它无法像上面提到的那样声明MultipartException。@User_Targaryen向spring的端点添加了consumes,并为Reactwild guess添加了选项,但我将重点关注节点代码中的传递“头”。原因-POST stack有时可能会在代码设置的标题之外添加标题。这些“推断”头VAL@RequestBody MultipartFile file
时,请求到达JAVA控制器,但file
为null
。为什么?感谢您在FormData