Proxy Workaround for M3
It took me hours to figure out (I'm not even sure if I would call this a progress) to make Spring Social work behind our proxy.
The main problem is there's no easy way to setup the proxy. A direct call to HttpClient is entirely impossible via plain XML config. (Maybe even via Java-config?)
Basically the idea is to modify the RequestFactory that is passed to RestTemplate's constructor. So that it contains the proxy settings:
The workaround is two parts:Code:SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory(); Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("my.company.org", 9999)); requestFactory.setProxy(proxy); RestTemplate restTemplate = new RestTemplate(requestFactory);
First, I had to reimplement FacebookOAuth2Template createRestTemplate() method:
Literally, I created a new class and copied the whole implementation of FacebookOAuth2Template and renamed the new class as ModifiedFacebookOAuth2Template.Code:@Override protected RestTemplate createRestTemplate() { SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory(); Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("my.company.org", 9999)); requestFactory.setProxy(proxy); RestTemplate restTemplate = new RestTemplate(requestFactory); FormHttpMessageConverter messageConverter = new FormHttpMessageConverter() { public boolean canRead(Class<?> clazz, MediaType mediaType) { // always read as x-www-url-formencoded even though Facebook sets contentType to text/plain return true; } }; restTemplate.setMessageConverters(Collections.<HttpMessageConverter<?>>singletonList(messageConverter)); return restTemplate; }
This works on the authentication part to Facebook. I can see clearly in the userconnection table that the Facebook connection has been created. However, when I try to view my profile and post to my wall, I get a timeout error. Again, it's because the proxy is not setup though I already did!
It turns out I also have to modify the RequestFactory that's declared inside the FacebookTemplate. This is the second part.
FacebookTemplate calls the following factory class to initialize its RestTemplate:
So basically I had to modify ProtectedResourceClientFactory and re-implemented it like the following:Code:this.restTemplate = ProtectedResourceClientFactory.draft10(accessToken);
But then in order for this to work, I had to literally copy 20+ classes and modify their visibility to public so that my custom package is able to see them! For example, EventTemplate, CommentList, AlbumList, ReferenceList, VideoList, OAuth2Version, and so forth.Code:private static RestTemplate version(String accessToken, OAuth2Version version) { SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory(); Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("my.company.org", 9999)); requestFactory.setProxy(proxy); RestTemplate client = new RestTemplate(requestFactory); if (interceptorsSupported) { // favored client.setInterceptors(new ClientHttpRequestInterceptor[] { new OAuth2RequestInterceptor(accessToken, version) }); } else { // 3.0.x compatibility client.setRequestFactory(new Spring30OAuth2RequestFactory(client.getRequestFactory(), accessToken, version)); } return client; }
It's too lengthy and takes a lot of work. The visibility of these classes made the modification tedious.
My application works, but I believe there should be a simpler way to set this up. I tried adding Apache Commons HttpClient 4.1 in the classpath and see if I can modify it's parameters so that the proxy settings are assingned to. Unfortunately, the HttpClient is created runtime and not via configuration.
I assume it would also work if I copy and modify the classes that contain HttpClient but that would even require more classes to edit.
Or maybe there's an easy that I've missed?
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Thanks for opening-up a JIRA as well. I appreciate it.
