Python請求：1個單個請求中的POST JSON和文件（多種數據）

Question

從客戶端（使用python），我想使用multiform-data作為單個請求的一部分發送json數據和文件，但無法實現這一點。 在服務器端，我有Jersey，如果我使用curl發送請求，則工作正常，但如果使用Python發送相同的請求，則它不會起作用，因為Jersey崩潰。

python-requests軟件包版本0.8.2-1。 我無法升級到最新版本，因為這是ubuntu 12.04可用的最新版本。

低於curl的請求工作正常，服務器可以使用curl以下的請求成功處理請求。

curl -v -k -u "test:" -F file=@/tmp/test_new.zip --form upload_info='{"id": "1234", "test": "testing"}' -X POST "https://IP/test_api"

服務器端代碼段

    @POST
    @Path("/test_api")
    @Consumes(MediaType.MULTIPART_FORM_DATA)
    @Produces(MediaType.APPLICATION_JSON)
    public Response testAPIHandler(
                    @HeaderParam("Authorization") String auth,
                    @FormDataParam("file") InputStream uploadedInputStream,
                    @FormDataParam("file") FormDataContentDisposition fileDetail,
                    @FormDataParam("upload_info") JSONObject jsonData) throws IOException {
             try {
                    id = jsonData.getString("id");
                    url = jsonData.getString("test");
                 }

這是此python代碼，但不起作用。 甚至嘗試以相同的鍵名“ upload_info”將upload_info作為嵌套json發送，也無法正常工作。

def test_upload():
    url = "https://IP/api/test_api"
    user = "test"
    passwd = None
    upload_info = {'id': '1234', 'test': "testing"}
    filepath = "/tmp/test_new.zip"
    json_data = simplejson.dumps(upload_info)

    fileobj = open(filepath, 'rb')
    files = {'file' : ('test_new.zip', fileobj)}

    headers = {'Content-type': 'multipart/form-data'}
    r = requests.post(url, files=files, data=json_data, auth=(user, passwd), headers=headers)

    print r.status_code

test_upload()

當我使用Python發送請求時，服務器端出現此異常

May 25, 2015 9:35:03 PM com.sun.jersey.spi.container.ContainerResponse mapMappableContainerException
SEVERE: The RuntimeException could not be mapped to a response, re-throwing to the HTTP container
java.lang.NullPointerException
    at com.sun.jersey.multipart.impl.MultiPartReaderClientSide.unquoteMediaTypeParameters(MultiPartReaderClientSide.java:227)
    at com.sun.jersey.multipart.impl.MultiPartReaderClientSide.readMultiPart(MultiPartReaderClientSide.java:154)
    at com.sun.jersey.multipart.impl.MultiPartReaderServerSide.readMultiPart(MultiPartReaderServerSide.java:80)
    at com.sun.jersey.multipart.impl.MultiPartReaderClientSide.readFrom(MultiPartReaderClientSide.java:144)
    at com.sun.jersey.multipart.impl.MultiPartReaderClientSide.readFrom(MultiPartReaderClientSide.java:82)
    at com.sun.jersey.spi.container.ContainerRequest.getEntity(ContainerRequest.java:488)
    at com.sun.jersey.spi.container.ContainerRequest.getEntity(ContainerRequest.java:552)
    at com.sun.jersey.multipart.impl.FormDataMultiPartDispatchProvider$FormDataInjectableValuesProvider.getInjectableValues(FormDataMultiPartDispatchProvider.java:122)
    at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$EntityParamInInvoker.getParams(AbstractResourceMethodDispatchProvider.java:153)
    at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:203)
    at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
    at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302)
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1511)
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1442)
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1391)
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1381)
    at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
    at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:538)
    at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:716)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
    at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:200)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)

Answer 1

發送文件和數據參數作為request.post（）的一部分對我不起作用，所以我最終要做的是將json數據作為輸入流發送。 我在Python端將JSON數據轉換為StringIO，然后在“文件”參數中將StringIO對象作為另一個文件對象發送，在服務器端，我將其作為InputStream接收，並轉換為JSONObject以獲取所需的值。

服務器上的Jersey代碼：

    @POST
    @Path("/test_upload_files")
    @Consumes(MediaType.MULTIPART_FORM_DATA)
    @Produces(MediaType.APPLICATION_JSON)
    public Response testHandler(
                    @HeaderParam("Authorization") String auth,
                    @FormDataParam("file") InputStream uploadedInputStream,
                    @FormDataParam("file") FormDataContentDisposition fileDetail,
                    @FormDataParam("json_data") InputStream jsonStream) throws IOException {
            String encoding = "UTF-8";
            JSONObject jsonObject;

            StringWriter writer = new StringWriter();

            IOUtils.copy(jsonStream, writer, encoding);

            String input = writer.toString();

            try {
                    jsonObject = new JSONObject(input);
                    id = jsonObject.getString("id");
                    country = jsonObject.getString("country");
            } catch (JSONException e) {
                    return null;
            }

    }

這是要發送的Python代碼：

import simplejson
import requests
from cStringIO import StringIO

def upload_files_and_json():
    url = "https://IP/test_upload_files"
    user = "foo"
    passwd = None
    upload_info = {'id': '1234', 'country': 'zzz'}
    filepath = "/tmp/test.zip"
    json_data = simplejson.dumps(upload_info)
    json_input = StringIO(json_data)

    fileobj = open(filepath, 'rb')
    files = {'file' : ('test.zip', fileobj), 'json_data': json_input}

    r = requests.post(url, files=files, auth=(user, passwd))

Answer 2

這是我嘗試安裝請求包的方法

import requests    

class RestCall:

    if __name__ == '__main__':

        url = "http://url.com/rest/doj/webservice/helloge"

        data = dict(fn='Test', ln='Me')

        r = requests.post(url, data=data, allow_redirects=True)
        print (r.content)

您的服務器組件如下所示

@POST
@Path("/helloge")
@Produces("text/plain")
public String helloGe(@FormParam("fn") String fn,@FormParam("ln") String ln){
    return "Hello "+fn+" "+ln;    
}

您的輸出是：

b'Hello Test Me'