这是一个巨坑，先上源码：
//Android
/**
* 上传图像到服务器
* @param img
*/
public void uploadImgToServer(File img) throws UnsupportedEncodingException {
sp = mContext.getSharedPreferences("member_log", Context.MODE_PRIVATE);
String fileName = sp.getString("username","");
String finalName = URLEncoder.encode(fileName,"utf-8");//解析中文到GBK编码
MediaType MEDIA_TYPE_JPG = MediaType.parse("application/x-www-form-urlencoded");
RequestBody requestBody = MultipartBody.create(MEDIA_TYPE_JPG,img);
// String finalName = getValueEncoded(fileName);
// 把我坑的一上午你妈的，老子一致在NetUtils
// 里面转悠，没有想到你是发送到服务器的最后一步。
MultipartBody.Builder builder = new MultipartBody.Builder()
.setType(MultipartBody.FORM)
.addFormDataPart("title","Logo")
.addFormDataPart("img",finalName+".jpg", //封装上传图片的参数
requestBody);
//ReqestBody中要携带参数
RequestBody multipartBody = builder.build();//Build a instance of RequestBody
String url = "http://192.168.1.117:8080/polls/uploadHeadImg/";
Request request = new Request.Builder()
.url(url)
// .addHeader("Accept","text/plain")
.addHeader("Accept-Charset", "UTF-8")
// .addHeader("Content-Type","application/x-www-form-urlencoded; charset=utf-8")
.post(multipartBody)
.build();
Call call = client.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Log.e("TAG","onFaile:" +e);
Thread thread = new Thread(() -> {
Looper.prepare();
Toast.makeText(mContext,"上传失败",Toast.LENGTH_LONG).show();
Looper.loop();
});
thread.start();
}
@Override
public void onResponse(Call call, Response response) throws IOException {
Log.e("TAG","success");
if(!response.isSuccessful()){
Thread thread = new Thread(() -> {
Looper.prepare();
Toast.makeText(mContext,"上传成功,请求失败",
Toast.LENGTH_LONG).show();
Looper.loop();
});
thread.start();
}else{
Thread thread = new Thread(() -> {
Looper.prepare();
try {
Toast.makeText(mContext,"上传成功,返回信息:"+response.body().string(),
Toast.LENGTH_LONG).show();
} catch (IOException e) {
e.printStackTrace();
}
Looper.loop();
});
thread.start();
}
}
});
}
贴出Django代码：
# Add member head portrait
@csrf_exempt
def uploadHeadImg(request):
source = request.FILES.get('img')
if source:
firstName = source.name
secondName = os.path.splitext(firstName)[0]#Double check trim the blank.
finalName = unquote(secondName)
source.name = finalName+".jpg"
member = Member.objects.get(user_name=finalName)
member.attribute_set.create(head_img=source, name=finalName, last_login_time=timezone.now())
return HttpResponse(source.name+"upload success", content_type="text/plain")
else:
return HttpResponse(source.name+"Failed", content_type="text/plain")
以上代码亲测upload server picture没有任何问题，可是奇怪的现象出现了，在onResponse中 response.code() 得到http error code 500，我找了N多个博文，大多数都是在StackOverflow上面，都说的要么很深，要么驴头不对马嘴，都没有解决。最后发现，问题出现在你的服务器上是否存在文件，如果不存在就需要用create的方式，如果存在了，注意:就一定要用我列举的第二种方式，要不然就会一直返回500如下：
- 改变model的存储方式需要判断，正确的代码如下：
# Add member head portrait
@csrf_exempt
def uploadHeadImg(request):
source = request.FILES.get('img')
if source:
firstName = source.name
secondName = os.path.splitext(firstName)[0]#Double check trim the blank.
finalName = unquote(secondName)
source.name = finalName+".jpg"
member = Member.objects.get(user_name=finalName)
if member.attribute_set.all().exists():#先判断查询集里面是否有模型对象如果没有说明是第一次设置头像，并不是修改头像。
attribute = member.attribute_set.get(img_name=finalName)
attribute.head_img = source
attribute.img_name = finalName
attribute.save()
else:
member.attribute_set.create(img_name=finalName, head_img=source, last_login_time=datetime.now())#第一次修改头像，就必须用这种方法
return HttpResponse(json.dumps(
{"headImg_path":"httP://127.168.1.117:8080/midea/headImg/"+source.name}
), content_type='application/json; charset=utf-8')
else:
return HttpResponse(json.dumps({
'error_code':100,
'result':'request_error'
}))
