Create a multi-user REST request for Android with one part image and one json part
I am having a problem making a Multipart request with Rest pattern, spring-android and annotations. I have found many examples of using Multipart to load images or String objects, but I cannot find any solution when implementing the request which is the image part and the second json part.
The request should be something like this
Title:
Content-Type: multipart/form-data; boundary=--abcd12345
Authorization:Basic 1234567890
Body
--abcd12345
Content-Disposition: form-data; name="photo"; filename="image123.jpg"
Content-Type: image/jpeg
<@INCLUDE *C:\Users\John\Desktop\image123.jpg*@>
--abcd12345
Content-Disposition: form-data; name="item"
Content-Type: application/json
{
"name": "My item",
"description": "My item description",
"categories": [1,2]
}
--abcd12345--
I have tried many variations and combinations ... I create a request using MultiValueMap but all my efforts end up on the server giving me Can't use content type .
If anyone knows how to implement this plz please tell me. And to clear up the problem a little more, I cannot use any other libraries like apache mime and the old MultiPartBuilder mod etc.
This is the most common example on the web that has one image part and another part String.
MultiValueMap<String, Object> parts = new LinkedMultiValueMap<String, Object>();
parts.add("file", new FileSystemResource(fileToUpload));
parts.add("method", "hello,world");
String response = mRestClient.uploadFile(parts);
@Rest(rootUrl = "...", converters = {ByteArrayHttpMessageConverter.class, FormHttpMessageConverter.class, StringHttpMessageConverter.class})
public interface RestClient {
@Post("")
public String uploadFile(MultiValueMap data);
}
source to share
How I did it:
// convert image to Base64 String
ByteArrayOutputStream stream = new ByteArrayOutputStream();
Bitmap image = getImageFile(imagePath);
image.compress(Bitmap.CompressFormat.JPEG, 100, stream);
byte[] imageBytes = stream.toByteArray();
String encodedImage = Base64.encodeToString(imageBytes, Base64.DEFAULT);
// create new item
ItemCreateDto newItemDto = new ItemCreateDto();
newItemDto.setName(new_item_name.getText().toString());
newItemDto.setDescription(new_item_description.getText().toString());
ObjectMapper obj = new ObjectMapper();
String body = obj.writeValueAsString(newItemDto);
MultiValueMap<String, Object> multiValueMap = new LinkedMultiValueMap<String, Object>();
// create header with content-disposition for image part
HttpHeaders imageHeaders = new HttpHeaders();
imageHeaders.add("Content-Disposition", "form-data; name=photo; filename=photo.jpeg");
imageHeaders.setContentType(MediaType.IMAGE_JPEG);
HttpEntity<String> imageEntity = new HttpEntity<String>(encodedImage, imageHeaders);
// create header for data part
HttpHeaders dataHeaders = new HttpHeaders();
dataHeaders.add("Content-Disposition", "form-data; name=item");
dataHeaders.setContentType(MediaType.APPLICATION_JSON);
HttpEntity<String> dataEntity = new HttpEntity<String>(body, dataHeaders);
// add headers to multiValueMap
multiValueMap.add("photo", imageEntity);
multiValueMap.add("item", dataEntity);
newItemAPI.createItem(multiValueMap);
And AndroidAnnotation + Android Spring part:
@Rest(rootUrl = "", converters = { ByteArrayHttpMessageConverter.class, MappingJackson2HttpMessageConverter.class, FormHttpMessageConverter.class })
public interface INewItemRestClient {
@Post("")
@Accept(MediaType.APPLICATION_JSON)
@RequiresHeader({"Authorization", "Content-Type"})
String createItem(MultiValueMap<String, Object> data);
hope this helps you ...
source to share