Android-Django图片上传

知识就是力量,时间就是生命。这篇文章主要讲述Android-Django图片上传相关的知识,希望能为你提供帮助。
我试图上传图像与android作为前端和django作为后端。
该模型:

class Photo(models.Model): title = models.CharField(max_length=255,blank=True) photo = models.FileField(upload_to='photos') description = models.TextField(blank=True) uploaded = models.DateTimeField(auto_now_add=True) modified = models.DateTimeField(auto_now=True)class Meta: db_table = 'media_photos'def __unicode__(self): return '%s' % self.title

url url的视图(r'^ photos / upload / $','upload_photo'):
def upload_photo(request): form=PhotoForm(request.POST,request.FILES) if request.method=='POST': if form.is_valid(): image = request.FILES['photo'] title1 ='' new_image = Photo(title=title1,photo=image,description='') new_image.save() response_data=https://www.songbingjia.com/android/[{"success": "1"}] return HttpResponse(simplejson.dumps(response_data), mimetype='application/json')

现在我想从android访问这里的视图。所以现在我上传图像的android端代码是:
public void doFileUpload(String path){ HttpURLConnection conn = null; DataOutputStream dos = null; DataInputStream inStream = null; String lineEnd = ""; int bytesRead, bytesAvailable, bufferSize; byte[] buffer; int maxBufferSize = 1*1024*1024; String urlString = "http://"; // server ip try { //------------------ CLIENT REQUEST FileInputStream fileInputStream = new FileInputStream(new File(path) ); // open a URL connection to the Servlet URL url = new URL(urlString); // Open a HTTP connection to the URL conn = (HttpURLConnection) url.openConnection(); // Allow Inputs conn.setDoInput(true); // Allow Outputs conn.setDoOutput(true); // Don't use a cached copy. conn.setUseCaches(false); // Use a post method. conn.setRequestMethod("POST"); conn.setRequestProperty("Connection", "Keep-Alive"); conn.setRequestProperty("Content-Type", "multipart/form-data; boundary="+""); dos = new DataOutputStream( conn.getOutputStream() ); dos.writeBytes(lineEnd); dos.writeBytes("Content-Disposition: form-data; name="uploadedfile"; filename="" + path + """ + lineEnd); dos.writeBytes(lineEnd); // create a buffer of maximum size bytesAvailable = fileInputStream.available(); bufferSize = Math.min(bytesAvailable, maxBufferSize); buffer = new byte[bufferSize]; // read file and write it into form... bytesRead = fileInputStream.read(buffer, 0, bufferSize); while (bytesRead > 0) { dos.write(buffer, 0, bufferSize); bytesAvailable = fileInputStream.available(); bufferSize = Math.min(bytesAvailable, maxBufferSize); bytesRead = fileInputStream.read(buffer, 0, bufferSize); }// send multipart form data necesssary after file data... dos.writeBytes(lineEnd); dos.writeBytes(lineEnd); // close streams Log.e("Debug","File is written"); fileInputStream.close(); dos.flush(); dos.close(); } catch (MalformedURLException ex) { Log.e("Debug", "error: " + ex.getMessage(), ex); } catch (IOException ioe) { Log.e("Debug", "error: " + ioe.getMessage(), ioe); }//------------------ read the SERVER RESPONSE try { inStream = new DataInputStream ( conn.getInputStream() ); String str; while (( str = inStream.readLine()) != null) { Log.e("Debug","Server Response "+str); } inStream.close(); } catch (IOException ioex){ Log.e("Debug", "error: " + ioex.getMessage(), ioex); } } }

但它给了我一个错误:
E/Debug(590): error: java.net.URISyntaxException: Authority expected at index 7: http://

答案应该是urlString = "http://192.168.1.2/photos/upload";
【Android-Django图片上传】但是如果它不起作用,你会得到一个不同的错误,我们可能需要该错误才能进一步回答。
此外,您似乎没有真正的边界字符串集,并且您没有正确使用它。
http://stunningco.de/2010/04/25/uploading-files-to-http-server-using-post-android-sdk/,注意他如何使用唯一的边界字符串,并将其写入输出流?
您应该开始将问题标记为已回答。当你这样做时,你会得到更好的成功。
另一答案即使你克服了这些困难,你也会违背Django的要求,即你提供一个带有POST参数的csrfmiddlewaretoken。我不知道你如何在Android设备上获得它; 通过设计,令牌是为了防止从除Django前端之外的任何东西(即“模板”)调用Django后端代码(即“视图”)。即它旨在阻止你正在尝试做的事情。
您可以在特定视图上禁用csrf功能 - 使用“@csrf_exempt”装饰器。然后你可以决定你是否足够关心安全性,找出你自己的替代品来解决csrf给你的东西。
或者,不是从Android应用程序上传图片,而是编写一个Web应用程序来上传图片,并让您的Django项目提供该Web应用程序。您的Android应用程序可以启动浏览器(作为Intent)并将其指向该Web应用程序。这里有一些代码可以做到:https://simpleisbetterthancomplex.com/tutorial/2016/08/01/how-to-upload-files-with-django.html(它不会赢得任何选美比赛,但确实有效。)

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