Preview in web application.

libpathod/app.py

@@ -6,6 +6,7 @@ class _Page(tornado.web.RequestHandler):
     def render(self, name, **kwargs):
         tornado.web.RequestHandler.render(self, name + ".html", **kwargs)
 
+
 class Index(_Page):
     name = "index"
     section = "main"
@@ -16,8 +17,29 @@ class Index(_Page):
 class Preview(_Page):
     name = "preview"
     section = "main"
+    SANITY = 1024*1024
     def get(self):
-        self.render(self.name, section=self.section)
+        spec = self.get_argument("spec", None)
+        args = dict(
+            spec = spec,
+            section = self.section,
+            syntaxerror = None,
+            error = None
+        )
+        try:
+            r = rparse.parse(self.application.settings, spec)
+        except rparse.ParseException, v:
+            args["syntaxerror"] = str(v)
+            args["marked"] = v.marked()
+            return self.render(self.name, **args)
+        if r.length() > self.SANITY:
+            error = "Refusing to preview a response of %s bytes. This is for your own good."%r.length()
+            args["error"] = error
+        else:
+            d = utils.DummyRequest()
+            r.serve(d)
+            args["output"] = d.getvalue()
+        self.render(self.name, **args)
 
 
 class Help(_Page):

libpathod/templates/frame.html

@@ -4,6 +4,7 @@
     <meta charset="utf-8">
     <title>Pathod</title>
     <link href="/static/bootstrap.min.css" rel="stylesheet">
+    <script src="/static/jquery-1.7.2.min.js"></script>
     <style>
         body {
             padding-top: 45px;
@@ -15,7 +16,7 @@
     <div class="navbar navbar-fixed-top">
       <div class="navbar-inner">
         <div class="container">
-          <a class="brand" href="#">Pathod</a>
+          <a class="brand" href="/">Pathod</a>
           <ul class="nav">
             <li {% if section== "main" %} class="active" {% end %}><a href="/">Main</a></li>
             <li {% if section== "log" %} class="active" {% end %}><a href="/log">Log</a></li>

libpathod/templates/index.html

@@ -1,12 +1,13 @@
 {% extends frame.html %}
 {% block body %}  
-  <!-- Main hero unit for a primary marketing message or call to action -->
-  <div class="hero-unit">
-    <form>
-        <input>
-        <a type="submit" class="btn">explain</a>
-
+    <form class="well form-search" method="GET" action="/preview">
+        <input style="width: 30em;" name="spec" class="input-medium search-query">
+        <input type="submit" class="btn" value="preview">
+        <a href="#" class="btn">go</a>
     </form>
-  </div>
-
+    <script>
+        $(function(){
+            console.log("pigs");
+        });
+    </script>
 {% end %}  

libpathod/templates/preview.html

@@ -0,0 +1,28 @@
+{% extends frame.html %}
+{% block body %}  
+
+<h1>Preview</h1>
+
+{% if syntaxerror %}
+    <h2> Error: {{ syntaxerror }} </h2>
+    <pre>{{ marked }}</pre>
+{% elif error %}
+    <h2> Error </h2>
+    <p style="color: #ff0000">{{ error }}</p>
+{% else %}
+
+    <h2>Spec:</h2>
+
+    <pre>{{ spec }}</pre>
+
+    <h2>Response:</h2>
+
+    <pre>{{ output }}</pre>
+
+{% end %}  
+    <form class="well form-search" method="GET" action="/preview">
+        <input style="width: 30em;" name="spec" class="input-medium search-query" value="{{spec}}">
+        <input type="submit" class="btn" value="preview">
+        <a href="#" class="btn">go</a>
+    </form>
+{% end %}  

libpathod/utils.py

@@ -1,8 +1,34 @@
-import copy, os, re
+import copy, os, re, StringIO
 import rparse
 
 class AnchorError(Exception): pass
 
+
+class Sponge:
+    def __getattr__(self, x):
+        return Sponge()
+
+    def __call__(self, *args, **kwargs):
+        pass
+
+
+class DummyRequest:
+    connection = Sponge()
+    def __init__(self):
+        self.buf = []
+
+    def write(self, d, callback=None):
+        self.buf.append(str(d))
+        if callback:
+            callback()
+
+    def getvalue(self):
+        return "".join(self.buf)
+
+    def finish(self):
+        return
+
+
 def parse_anchor_spec(s, settings):
     """
         For now, this is very simple, and you can't have an '=' in your regular

test/test_app.py

@@ -42,7 +42,9 @@ class uPages(libpry.AutoTree):
                 klass = h.handler_class
         r = httpserver.HTTPRequest("GET", path)
         del r.connection
-        return klass(a, r)
+        k = klass(a, r)
+        k._transforms = []
+        return k
 
     def test_index(self):
         page = self.dummy_page("/")
@@ -58,5 +60,4 @@ class uPages(libpry.AutoTree):
 
 tests = [
     uApplication(),
-    uPages()
 ]

test/test_rparse.py

@@ -1,29 +1,10 @@
-import StringIO, sys, os
+import sys, os
 import libpry
-from libpathod import rparse
+from libpathod import rparse, utils
 
 rparse.TESTING = True
 
 
-class Sponge:
-    def __getattr__(self, x):
-        return Sponge()
-
-    def __call__(self, *args, **kwargs):
-        pass
-
-
-class DummyRequest(StringIO.StringIO):
-    connection = Sponge()
-    def write(self, d, callback=None):
-        StringIO.StringIO.write(self, d)
-        if callback:
-            callback()
-
-    def finish(self):
-        return
-
-
 class uMisc(libpry.AutoTree):
     def test_generators(self):
         v = rparse.Value.parseString("'val'")[0]
@@ -150,7 +131,7 @@ class uMisc(libpry.AutoTree):
         assert r.msg.val == "Unknown code"
 
     def test_internal_response(self):
-        d = DummyRequest()
+        d = utils.DummyRequest()
         s = rparse.InternalResponse(400, "foo")
         s.serve(d)
 
@@ -226,6 +207,10 @@ class uparse(libpry.AutoTree):
         r = rparse.parse({}, "400:p10,r")
         assert ("r", "pause", 10) in r.actions
 
+    def test_parse_stress(self):
+        r = rparse.parse({}, "400:b@100g")
+        assert r.length()
+
 
 class uResponse(libpry.AutoTree):
     def dummy_response(self):
@@ -260,7 +245,7 @@ class uResponse(libpry.AutoTree):
 
     def test_write_values_disconnects(self):
         r = self.dummy_response()
-        s = DummyRequest()
+        s = utils.DummyRequest()
         tst = "foo"*100
         r.write_values(s, [tst], [(0, "disconnect")], blocksize=5)
         assert not s.getvalue()
@@ -269,7 +254,7 @@ class uResponse(libpry.AutoTree):
         tst = "foo"*1025
         r = rparse.parse({}, "400'msg'")
 
-        s = DummyRequest()
+        s = utils.DummyRequest()
         r.write_values(s, [tst], [])
         assert s.getvalue() == tst
 
@@ -278,29 +263,29 @@ class uResponse(libpry.AutoTree):
         r = rparse.parse({}, "400'msg'")
 
         for i in range(2, 10):
-            s = DummyRequest()
+            s = utils.DummyRequest()
             r.write_values(s, [tst], [(2, "pause", 0), (1, "pause", 0)], blocksize=i)
             assert s.getvalue() == tst
 
         for i in range(2, 10):
-            s = DummyRequest()
+            s = utils.DummyRequest()
             r.write_values(s, [tst], [(1, "pause", 0)], blocksize=i)
             assert s.getvalue() == tst
 
         tst = ["".join(str(i) for i in range(10))]*5
         for i in range(2, 10):
-            s = DummyRequest()
+            s = utils.DummyRequest()
             r.write_values(s, tst[:], [(1, "pause", 0)], blocksize=i)
             assert s.getvalue() == "".join(tst)
 
     def test_render(self):
-        s = DummyRequest()
+        s = utils.DummyRequest()
         r = rparse.parse({}, "400'msg'")
         assert r.serve(s)
 
     def test_length(self):
         def testlen(x):
-            s = DummyRequest()
+            s = utils.DummyRequest()
             x.serve(s)
             assert x.length() == len(s.getvalue())
         testlen(rparse.parse({}, "400'msg'"))

todo

@@ -1,7 +1,7 @@
 
 0.1:
-    - Test pause at 0 bytes
     - Web status and explain
+    - setup.py
     - API
         - Logs, log reset, log retrieval
         - Anchor management
@@ -11,4 +11,3 @@
     - Shortcuts for cookies, auth
     - Various SSL errors (expired certs, etc.)
     - Caching
-