Merge pull request +14198 from c9/preview-fix-invalid-characters-in-header

Catch errors where header contains invalid characters

plugins/c9.preview/preview.handler.js

@@ -162,6 +162,7 @@ define(function(require, exports, module) {
                 }
                 
                 debug("proxy call %s", url);
+                try {
                     httpModule.get({
                         path: parsedUrl.path,
                         hostname: parsedUrl.hostname,
@@ -180,6 +181,15 @@ define(function(require, exports, module) {
                         metrics.increment("preview.failed.error");
                         next(err); 
                     });
+                } catch (e) {
+                    logError(new Error("httpModule.get threw unexpected error"), {
+                        message: e.message,
+                        url: url,
+                        headers: req.headers
+                    });
+                    metrics.increment("preview.failed.error");
+                    return next(new error.BadRequest(e.message));
+                }
                 
                 function handleError(request) {
                     var body = "";