I want to send an Article from and Android client to a REST server. Here is the Python model from the server:
class Article(models.Model):
author = models.CharField(max_length=256, blank=False)
photo = models.ImageField()
The following interface describes the former implementation:
@POST("/api/v1/articles/")
public Observable<CreateArticleResponse> createArticle(
@Body Article article
);
Now I want to send an image with the Article data. The photo
is not part of the Article model on the Android client.
@Multipart
@POST("/api/v1/articles/")
public Observable<CreateArticleResponse> createArticle(
@Part("article") Article article,
@Part("photo") TypedFile photo
);
The API is prepared and successfully tested with cURL.
$ curl -vX POST http://localhost:8000/api/v1/articles/ \
-H "Content-Type: multipart/form-data" \
-H "Accept:application/json" \
-F "author=cURL" \
-F "photo=@/home/user/Desktop/article-photo.png"
When I send data through createArticle()
from the Android client I receive an HTTP 400
status stating that the fields are required/missing.
D <--- HTTP 400 http://192.168.1.1/articles/ (2670ms)
D Date: Mon, 20 Apr 2015 12:00:00 GMT
D Server: WSGIServer/0.1 Python/2.7.8
D Vary: Accept, Cookie
D X-Frame-Options: SAMEORIGIN
D Content-Type: application/json
D Allow: GET, POST, HEAD, OPTIONS
D OkHttp-Selected-Protocol: http/1.0
D OkHttp-Sent-Millis: 1429545450469
D OkHttp-Received-Millis: 1429545453120
D {"author":["This field is required."],"photo":["No file was submitted."]}
D <--- END HTTP (166-byte body)
E 400 BAD REQUEST
This is what is received as request.data
on the server side:
ipdb> print request.data
<QueryDict: {u'article': [u'{"author":"me"}'], \
u'photo': [<TemporaryUploadedFile: IMG_1759215522.jpg \
(multipart/form-data)>]}>
How can convert the Article object in a multipart conform data type? I read that Retrofit might allow to use Converters for this. It should be something that implements a retrofit.mime.TypedOutput
as far as I understood for the documentation.
Multipart parts use the
RestAdapter
's converter or they can implementTypedOutput
to handle their own serialization.
Related
- HTML 4.01 Specification - Form submission - multipart/form-data
- Retrofit Annotation Type Part documentation
- Upload multipart image data in JSON with Retrofit?
- REST - HTTP Post Multipart with JSON
- Retrofit Multipart Upload Image failed
- Retrofit issue #178: Create manual for sending files with retrofit
- Retrofit issue #531: Problem uploading file via POST/Multipart
- Retrofit issue #658: Not able to send string parameters with image when using Multipart
- Retrofit issue #662: Retrofit Form Encoded and Multipart in single request
RestAdapter
and check exactly what data is being sent. – corsair992TypedFile
for both the JSON data (article
) and the image? Please point me to how to convert the data. / @corsair992 I updated my post. – JJD{"author":"authorNameHere","photo":"base64ImageBytesHere"]}
. If this is the case I can provide the code on how to do that with Okio and Retrofit. – Sergii Pechenizkyi