Specify a custom user-agent string for all default requests.

[automanga.git] / manga / lib.py

diff --git a/manga/lib.py b/manga/lib.py
index 21edd3d..662ecc3 100644 (file)
--- a/manga/lib.py
+++ b/manga/lib.py
@@ -9,6 +9,19 @@ class library(object):
         All libraries should implement this."""
         raise NotImplementedError()
 
+    def search(self, string):
+        """Returns an iterable object of mangas in this library that
+        matches the search string in a library-dependent manner. While
+        each library is at liberty to define its own matching
+        criteria, it is probably likely to involve something akin to
+        searching for keywords in the titles of the library.
+
+        Searching may return very many results and may be slow to
+        iterate.
+
+        Not all libraries need implement this."""
+        raise NotImplementedError()
+
     def byid(self, id):
         """Returns a previously known manga by its string ID, or
         raises KeyError if no such manga could be found.
@@ -136,11 +149,43 @@ class imgstream(object):
         """Close this stream."""
         raise NotImplementedError()
 
-    def read(self, sz = None):
+    def read(self, sz=None):
         """Read SZ bytes from the stream, or the entire rest of the
         stream of SZ is not given."""
         raise NotImplementedError()
 
+class stdimgstream(imgstream):
+    """A standard implementation of imgstream, for libraries which
+    have no particular implementation requirements."""
+
+    def __init__(self, url):
+        import urllib.request
+        req = urllib.request.Request(url, headers={"User-Agent": "automanga/1"})
+        print(req)
+        self.bk = urllib.request.urlopen(req)
+        ok = False
+        try:
+            if self.bk.getcode() != 200:
+                raise IOError("Server error: " + str(self.bk.getcode()))
+            self.ctype = self.bk.info()["Content-Type"]
+            self.clen = int(self.bk.info()["Content-Length"])
+            ok = True
+        finally:
+            if not ok:
+                self.bk.close()
+
+    def fileno(self):
+        return self.bk.fileno()
+
+    def close(self):
+        self.bk.close()
+
+    def read(self, sz=None):
+        if sz is None:
+            return self.bk.read()
+        else:
+            return self.bk.read(sz)
+
 class cursor(object):
     def __init__(self, ob):
         if isinstance(ob, cursor):
@@ -175,7 +220,8 @@ class cursor(object):
 loaded = {}
 def findlib(name):
     def load(name):
-        mod = __import__(name, fromlist=["dummy"])
+        import importlib
+        mod = importlib.import_module(name)
         if not hasattr(mod, "library"):
             raise ImportError("module " + name + " is not a manga library")
         return mod.library()