HTTP帖子与Matlab [英] HTTP Post with Matlab
问题描述
我按照这篇文章中给出的示例：如何发送数据从Matlab到Rails ，但收到的错误消息是我找不到任何信息。我的脚本如下所示：
I followed the example given in this post: How to send data from Matlab to Rails, but am receiving an error message that I cannot find any information on. My script looks like this:
javaaddpath('./httpcomponents/httpclient-4.2.2.jar')
javaaddpath('./httpcomponents/httpcore-4.2.2.jar')
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
httpclient = DefaultHttpClient();
httppost = HttpPost('http://localhost:3000/signin');
httppost.addHeader('Content-Type','application/json');
httppost.addHeader('Accept','application/json');
tokenRequest = StringEntity('{"session", "{email_address:""email@aol.com,""password:""password""}"}');
httppost.setEntity(tokenRequest);
response = httpclient.execute(httppost);
在最后一行，我收到错误：
On the last line, I get the error:
发生Java异常：java.lang.VerifyError：无法从最终类继承
从在线搜索中，我认为这是软件版本问题。我尝试使用这些文件的4.2版本（与其他帖子中使用的相同），但我收到了同样的错误。有谁知道什么可能是错的？或者知道如何在不使用这些外部库的情况下做我想做的事情？
From searches online, I gather that this is a software version issue. I tried using the 4.2 builds of those files (the same ones used in the other post), but I received the same error. Does anyone have an idea what could be wrong? Or know a way to do what I am trying to do without using these external libraries?
编辑：
最初我尝试使用此代码：
originally I tried using this code:
tokenRequest = {'session', '{''email_address'':''email@aol.com'',''password'':''password''}'};
token = urlread('http://localhost:3000/signin','POST',tokenRequest);
但是我收到NoMethodError导致我发到其他帖子：
but I received the NoMethodError that led me to that other post:
NoMethodError (undefined method `each' for "{'email_address':'email@aol.com','password':'password'}":String):
app/models/session.rb:14:in `initialize'
我认为抛出此错误的原因是因为服务器认为它正在接收一个String对象，该对象没有每个方法。我假设我会通过使用'Content-Type'参数来指定它的json来解决这个问题。有没有办法使用urlread这样做？
I think the reason it throws this error is because the server thinks it is receiving a String object, which doesn't have an each method. I assume I would fix this by using the 'Content-Type' argument to specify that its json. Is there a way to do this using urlread?
编辑：java libs问题的完整堆栈跟踪
full stack trace for java libs issue
Java exception occurred:
java.lang.VerifyError: Cannot inherit from final class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at com.mathworks.jmi.CustomURLClassLoader.findClass(ClassLoaderManager.java:760)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at org.apache.http.impl.client.DefaultHttpClient.createHttpParams(DefaultHttpClient.java:157)
at org.apache.http.impl.client.AbstractHttpClient.getParams(AbstractHttpClient.java:448)
at org.apache.http.impl.client.AbstractHttpClient.createClientConnectionManager(AbstractHttpClient.java:309)
at org.apache.http.impl.client.AbstractHttpClient.getConnectionManager(AbstractHttpClient.java:466)
at org.apache.http.impl.client.AbstractHttpClient.createHttpContext(AbstractHttpClient.java:286)
at
org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:851)
at
org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:805)
at
org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:784)
推荐答案
urlread2 原来是一个更好的解决方案。此代码完成工作：
urlread2 turned out to be a much better solution. This code does the job:
tokenRequest = '{ "session" : { "email_address": "email@aol.com", "password": "password" } }';
header = http_createHeader('Content-Type','application/json');
token = urlread2('http://localhost:3000/signin.json','POST',tokenRequest,header);
这篇关于HTTP帖子与Matlab的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
