Merge pull request #7 from Bytom/merge_tx_signer

[bytom/bytom-java-sdk.git] / tx-signer / src / main / java / io / bytom / offline / exception / ConnectivityException.java

diff --git a/tx-signer/src/main/java/io/bytom/offline/exception/ConnectivityException.java b/tx-signer/src/main/java/io/bytom/offline/exception/ConnectivityException.java
new file mode 100755 (executable)
index 0000000..d188f07
--- /dev/null
+++ b/tx-signer/src/main/java/io/bytom/offline/exception/ConnectivityException.java
@@ -0,0 +1,38 @@
+package io.bytom.offline.exception;\r
+\r
+import com.squareup.okhttp.Response;\r
+\r
+import java.io.IOException;\r
+\r
+/**\r
+ * ConnectivityException wraps errors due to connectivity issues with the server.\r
+ */\r
+public class ConnectivityException extends BytomException {\r
+    /**\r
+     * Initializes exception with its message attribute.\r
+     *\r
+     * @param resp the server response used to create error message\r
+     */\r
+    public ConnectivityException(Response resp) {\r
+        super(formatMessage(resp));\r
+    }\r
+\r
+    /**\r
+     * Parses the the server response into a detailed error message.\r
+     *\r
+     * @param resp the server response\r
+     * @return detailed error message\r
+     */\r
+    private static String formatMessage(Response resp) {\r
+        String s =\r
+                "Response HTTP header field Chain-Request-ID is unset. There may be network issues. Please check your local network settings.";\r
+        // TODO(kr): include client-generated reqid here once we have that.\r
+        String body;\r
+        try {\r
+            body = resp.body().string();\r
+        } catch (IOException ex) {\r
+            body = "[unable to read response body: " + ex.toString() + "]";\r
+        }\r
+        return String.format("%s status=%d body=%s", s, resp.code(), body);\r
+    }\r
+}\r