Is it possible for a web server to make a HTTPS request to itself?

问题

Imagine you have two applications, A & B, running on the same web server. You want app A to call a webService on app B over SSL.

Is it possible to do that with an address like https://localhost/appsB/webService1?

How can the SSL handshake be done without a client (like a browser?) It actually works when using this address http://localhost/appsB/webService1, only not in SSL mode.

However it works as well with HTTPS between the server and a browser when calling https://localhost/appsB/webService1.

Now, the strange thing is that it works sometimes but randomly fails when calling the webService on app B using HTTPS. Using HTTP it always works.

My tests are on IIS7.0 with a valid ssl certificate from Thawte with SSL option not required for app B.

Here is an exemple of my code :

string baseAddress = "http://localhost";
//or string baseAddress = "https://localhost";
var baseUri = new Uri(baseAddress);
//final url for appB
finalUrl = baseAddress + httpContext.Current.Request.ApplicationPath.TrimEnd('/') + "/" + url;
//Add a cookie to retrieve good contexte on appB
var cookieContainer = new CookieContainer();
using (var handler = new HttpClientHandler() { CookieContainer = cookieContainer })
using (var client = new HttpClient(handler) { BaseAddress = baseUri })
{
  cookieContainer.Add(baseUri, new Cookie("ASP.NET_SessionId", HttpContext.Current.Session.SessionID));
  HttpResponseMessage response = client.GetAsync(finalUrl).Result;
  Dictionary<string, dynamic> sData;
if (response.IsSuccessStatusCode)
{
    etc, etc..
}

回答1:

All you have to do is create a https client in server A to talk to talk to itself. Below is my code. In my case, it is a client in server A that talks to a webserver interface on Server A. In this case, I am measuring my servers latency performance.

// Get Administration Server Status
    public String adminServerStatus() {

        uri = "https://" + "localhost" + ":" + adminserverport + "/home";
        result = "grn";
        adminlatency = 0;

        // Build httpHeader entity
        HttpHeaders headers = new HttpHeaders();
        HttpEntity<String> httpentity = new HttpEntity<String>(headers);

        try {

            // Build the httpClient
            TrustStrategy acceptingTrustStrategy = (X509Certificate[] chain, String authType) -> true;
            SSLContext sslContext = org.apache.http.ssl.SSLContexts.custom()
                .loadTrustMaterial(null, acceptingTrustStrategy)
                .build();

            SSLConnectionSocketFactory csf = new SSLConnectionSocketFactory(sslContext);
            CloseableHttpClient httpClient = HttpClients.custom()
                .setSSLSocketFactory(csf)
                .build();

            // Build httpClient template
            HttpComponentsClientHttpRequestFactory requestFactory =
                new HttpComponentsClientHttpRequestFactory();
            requestFactory.setHttpClient(httpClient);               
            RestTemplate template = new RestTemplate(requestFactory);

            // Now go fire client status request & get latency duration
            timenow = System.currentTimeMillis();
            ResponseEntity<String> httpresult = template.exchange(uri, HttpMethod.GET, httpentity, String.class);
            adminlatency = System.currentTimeMillis() - timenow;

            HttpStatus statuscode = httpresult.getStatusCode();
            if (statuscode != HttpStatus.OK) {
                result = "yel";
                adminlatency = 0;
            }

            httpClient.close();

        // Error Caught
        } catch (Exception e) {
            result = "red";
            adminlatency = 0;
        }

        return result;
    }

来源：https://stackoverflow.com/questions/29236234/is-it-possible-for-a-web-server-to-make-a-https-request-to-itself