From: Fredrik Tolf <fredrik@dolda2000.com>
Date: Sun, 6 Nov 2011 19:56:52 +0000 (+0100)
Subject: Merge branch 'master' of git.dolda2000.com:/srv/git/r/wrw
X-Git-Url: http://dolda2000.com/gitweb/?a=commitdiff_plain;h=a4811d704ac8b4d97ae9af3841823ad2b56c4380;hp=397fd288ed6d5b8f96c414778df96acb35514f4d;p=wrw.git

Merge branch 'master' of git.dolda2000.com:/srv/git/r/wrw
---

diff --git a/wrw/proto.py b/wrw/proto.py
index 62d1769..6b43396 100644
--- a/wrw/proto.py
+++ b/wrw/proto.py
@@ -39,6 +39,56 @@ def urlq(url):
             ret += c
     return ret
 
+class urlerror(ValueError):
+    pass
+
+def parseurl(url):
+    p = url.find("://")
+    if p < 0:
+        raise urlerror("Protocol not found in absolute URL `%s'" % url)
+    proto = url[:p]
+    l = url.find("/", p + 3)
+    if l < 0:
+        raise urlerror("Local part not found in absolute URL `%s'" % url)
+    host = url[p + 3:l]
+    local = url[l:]
+    q = local.find("?")
+    if q < 0:
+        query = ""
+    else:
+        query = local[q + 1:]
+        local = local[:q]
+    return proto, host, local, query
+
+def consurl(proto, host, local, query = ""):
+    if len(local) < 1 and local[0] != '/':
+        raise urlerror("Local part of URL must begin with a slash")
+    ret = "%s://%s%s" % (proto, host, local)
+    if len(query) > 0:
+        ret += "?" + query
+    return ret
+
+def appendurl(url, other):
+    if "://" in other:
+        return other
+    proto, host, local, query = parseurl(url)
+    if len(other) > 0 and other[0] == '/':
+        return consurl(proto, host, other)
+    else:
+        p = local.rfind('/')
+        return consurl(proto, host, local[:p + 1] + other)
+
+def requrl(req):
+    host = req.ihead.get("Host", None)
+    if host is None:
+        raise Exception("Could not reconstruct URL because no Host header was sent")
+    proto = "http"
+    if req.https:
+        proto = "https"
+    if req.uri[0] != '/':
+        raise Exception("Malformed local part when reconstructing URL")
+    return "%s://%s%s" % (proto, host, req.uri)
+
 def parstring(pars = {}, **augment):
     buf = ""
     for key in pars:
diff --git a/wrw/resp.py b/wrw/resp.py
index 2e26ccf..8216d23 100644
--- a/wrw/resp.py
+++ b/wrw/resp.py
@@ -70,3 +70,14 @@ class httperror(usererror):
 class notfound(httperror):
     def __init__(self):
         return super(notfound, self).__init__(404)
+
+class redirect(dispatch.restart):
+    def __init__(self, url, status = 303):
+        super(redirect, self).__init__()
+        self.url = url
+        self.status = status
+
+    def handle(self, req):
+        req.status(self.status, "Redirect")
+        req.ohead["Location"] = proto.appendurl(proto.requrl(req), self.url)
+        return []