Added markdown support

Fixes issue #165

src/main/java/org/kohsuke/github/GHRepository.java

@@ -30,7 +30,9 @@
 import javax.xml.bind.DatatypeConverter;
 import java.io.FileNotFoundException;
 import java.io.IOException;
+import java.io.InputStreamReader;
 import java.io.InterruptedIOException;
+import java.io.Reader;
 import java.net.URL;
 import java.util.*;
 
@@ -1149,7 +1151,25 @@ public int getContributions() {
             return contributions;
         }
     }
-
+
+    /**
+     * Render a Markdown document.
+     *
+     * In {@linkplain MarkdownMode#GFM GFM mode}, issue numbers and user mentions
+     * are linked accordingly.
+     *
+     * @see GitHub#renderMarkdown(String)
+     */
+    public Reader renderMarkdown(String text, MarkdownMode mode) throws IOException {
+        return new InputStreamReader(
+            new Requester(root)
+                    .with("text", text)
+                    .with("mode",mode==null?null:mode.toString())
+                    .with("context", getFullName())
+                    .read("/markdown"),
+            "UTF-8");
+    }
+
 
 
     @Override

src/main/java/org/kohsuke/github/GitHub.java

@@ -26,8 +26,10 @@
 import static com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility.ANY;
 import static com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility.NONE;
 
+import java.io.ByteArrayInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
+import java.io.InputStreamReader;
 import java.io.Reader;
 import java.net.MalformedURLException;
 import java.net.URL;
@@ -470,6 +472,25 @@ protected void wrapUp(GHRepository[] page) {
         };
     }
 
+    /**
+     * Render a Markdown document in raw mode.
+     *
+     * <p>
+     * It takes a Markdown document as plaintext and renders it as plain Markdown
+     * without a repository context (just like a README.md file is rendered – this
+     * is the simplest way to preview a readme online).
+     *
+     * @see GHRepository#renderMarkdown(String, MarkdownMode)
+     */
+    public Reader renderMarkdown(String text) throws IOException {
+        return new InputStreamReader(
+            new Requester(this)
+                    .with(new ByteArrayInputStream(text.getBytes("UTF-8")))
+                    .contentType("text/plain;charset=UTF-8")
+                    .read("/markdown/raw"),
+            "UTF-8");
+    }
+
     /*package*/ static URL parseURL(String s) {
         try {
             return s==null ? null : new URL(s);

src/main/java/org/kohsuke/github/MarkdownMode.java

@@ -0,0 +1,29 @@
+package org.kohsuke.github;
+
+import java.util.Locale;
+
+/**
+ * Rendering mode of markdown.
+ *
+ * @author Kohsuke Kawaguchi
+ * @see GitHub#renderMarkdown(String)
+ * @see GHRepository#renderMarkdown(String, MarkdownMode)
+ */
+public enum MarkdownMode {
+    /**
+     * Render a document as plain Markdown, just like README files are rendered.
+     */
+    MARKDOWN,
+    /**
+     * Render a document as user-content, e.g. like user comments or issues are rendered.
+     * In GFM mode, hard line breaks are always taken into account, and issue and user
+     * mentions are linked accordingly.
+     *
+     * @see GHRepository#renderMarkdown(String, MarkdownMode)
+     */
+    GFM;
+
+    public String toString() {
+        return name().toLowerCase(Locale.ENGLISH);
+    }
+}

src/main/java/org/kohsuke/github/Requester.java

@@ -251,7 +251,7 @@ public InputStream read(String tailApiUrl) throws IOException {
             buildRequest(uc);
 
             try {
-                return uc.getInputStream();
+                return wrapStream(uc,uc.getInputStream());
             } catch (IOException e) {
                 handleApiError(e,uc);
             }

src/test/java/org/kohsuke/github/AppTest.java

@@ -4,6 +4,7 @@
 import com.google.common.collect.Iterables;
 import com.google.common.collect.Lists;
 
+import org.apache.commons.io.IOUtils;
 import org.junit.Assume;
 import org.junit.Test;
 import org.kohsuke.github.GHCommit.File;
@@ -758,11 +759,24 @@ public void testIssue162() throws Exception {
                 String content1 = content.getContent();
                 String content2 = r.getFileContent(content.getPath(), "gh-pages").getContent();
                 System.out.println(content.getPath());
-                assertEquals(content1,content2);
+                assertEquals(content1, content2);
             }
         }
     }
 
+    @Test
+    public void markDown() throws Exception {
+        assertEquals("<p><strong>Test日本語</strong></p>", IOUtils.toString(gitHub.renderMarkdown("**Test日本語**")).trim());
+
+        String actual = IOUtils.toString(gitHub.getRepository("kohsuke/github-api").renderMarkdown("@kohsuke to fix issue #1", MarkdownMode.GFM));
+        System.out.println(actual);
+        assertTrue(actual.contains("href=\"https://github.com/kohsuke\""));
+        assertTrue(actual.contains("href=\"https://github.com/kohsuke/github-api/pull/1\""));
+        assertTrue(actual.contains("class=\"user-mention\""));
+        assertTrue(actual.contains("class=\"issue-link\""));
+        assertTrue(actual.contains("to fix issue"));
+    }
+
     private void kohsuke() {
         String login = getUser().getLogin();
         Assume.assumeTrue(login.equals("kohsuke") || login.equals("kohsuke2"));