Android uses Multipartentitybuilder to implement file uploads like form form submission

Recently in the Android file upload, requires the form form to submit, the project uses the Afinal framework has the file upload function, but always can not be written with PHP server docking, unable to upload success. Read source discovery: Afinal used a great god to write the Multipartentity.java generated form form content, but the resulting content format is not standard, and there are many problems, such as: first read all the files into memory, and then generate a byte stream written to the socket. So here's the question: what if it's a hundreds of MB file?

Several searches, by this article (has been reproduced by me, but the example code has expired ) inspired , I found the Apache source Httpcomponents-client-4.3.6-src.zip, in an example, found an important component multipartentitybuilder, you can generate form form httpentity, with the Httpentity, no matter what HTTP frame you are, you should be able to use it.

don't know how to use it? Like this:

Httppost httppost = new httppost (URL); httppost.setentity (makemultipartentity (params,  files)); Httpresponse response = gethttpclient (). Execute (httppost);...private static  Httpclient mclient;private static httpclient gethttpclient ()  {     if (mclient == null)  {        //if ( BUILD.VERSION.SDK_INT >= 9);     //will not take this class of case, based on httpurlconnection         if (build.version.sdk_int >= 8)  {             mclient = androidhttpclient.newinstance (getUserAgent ());        }else {             mclient = new defaulthttpclient ();         }  &nbSp; }    return mclient;} 

Multipartentitybuilder Usage tidy up as follows:

Need to use Httpmime-4.3.6.jar and Httpcore-4.3.3.jar in Httpcomponents-client-4.3.6-bin.zip.

Public static httpentity makemultipartentity (list<namevaluepair> params, final  map<string, file> files)  {    MultipartEntityBuilder  Builder = multipartentitybuilder.create ();     builder.setmode ( httpmultipartmode.browser_compatible)//If there are sockettimeoutexception and so on, you can modify this enumeration     // Builder.setcharset (Charset.forname ("UTF-8"));//Do not use this will cause the server to receive parameters     if  (params  != null && params.size ()  > 0)  {         for  (Namevaluepair p : params)  {             builder.addtextbody (P.getname (),  p.getvalue (),  ContentType.TEXT_ Plain.withcharset ("UTF-8"));        }    }     if  (files != null&Nbsp;&& files.size ()  > 0)  {        set <entry<string, file>> entries = files.entryset ();         for  (entry<string, file> entry : entries)  {             builder.addpart (Entry.getKey (),  new  filebody (Entry.getvalue ()));         }    }     return builder.build ();}

An example of Apache is also attached , which can be found in Httpcomponents-client-4.3.6-bin.zip .

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Android uses Multipartentitybuilder to implement file uploads like form form submission