Implement URL parser

src/stdlib/url.pxd

+from stdlib.string cimport Str
+
+cdef cypclass URI:
+    Str full
+    Str scheme
+    Str authority
+    Str path
+    Str query
+    Str fragment
+
+    __init__(self, Str uri):
+        self.full = uri
+        self.parse(uri)
+
+    void parse(self, Str uri):
+        cdef int pos = 0
+        cdef int nxt
+        cdef Str COLUMN = Str(':')
+        cdef Str SLASH = Str('/')
+        cdef Str SLASHSLASH = SLASH + SLASH
+        cdef Str QUERY = Str('?')
+        cdef Str FRAGMENT = Str('#')
+        nxt = uri.find(COLUMN, pos)
+        if nxt != -1:
+            self.scheme = uri.substr(pos, nxt)
+            pos = nxt + COLUMN.__len__()
+        if uri.find(SLASHSLASH, pos, pos + SLASHSLASH.__len__()) != -1:
+            pos = nxt + SLASHSLASH.__len__()
+            nxt = uri.find(SLASH, pos)
+            if nxt == -1:
+                nxt = uri.find(QUERY, pos)
+            if nxt == -1:
+                nxt = uri.find(FRAGMENT, pos)
+            if nxt == -1:
+                self.authority = uri.substr(pos)
+                return
+            self.authority = uri.substr(pos, nxt)
+            pos = nxt
+        nxt = uri.find(QUERY, pos)
+        if nxt == -1:
+            nxt = uri.find(FRAGMENT, pos)
+            if nxt > pos:
+                self.path = uri.substr(pos, nxt)
+            elif nxt == -1:
+                self.path = uri.substr(pos)
+                return
+        else:
+            if nxt > pos:
+                self.path = uri.substr(pos, nxt)
+            pos = nxt + QUERY.__len__()
+            nxt = uri.find(FRAGMENT, pos)
+            if nxt == -1:
+                self.query = uri.substr(pos)
+                return
+            self.query = uri.substr(pos, nxt)
+        pos = nxt + FRAGMENT.__len__()
+        self.fragment = uri.substr(pos)
+