organize examples

This commit is largely based on work by Thiago Arrais (@thiagoarrais)
and Shane Bradfield (@l33tLumberjack). I wasn't really able to get their
PR reasonably merged onto the latest master, so I reapplied their changes
manually here and did some further improvements on that.

1 files changed, 16 insertions, 0 deletions

diff --git a/examples/simple/upsidedownternet.py b/examples/simple/upsidedownternet.py
new file mode 100644
index 00000000..8ba450ab
--- /dev/null
+++ b/examples/simple/upsidedownternet.py
@@ -0,0 +1,16 @@
+"""
+This script rotates all images passing through the proxy by 180 degrees.
+"""
+import io
+
+from PIL import Image
+
+
+def response(flow):
+    if flow.response.headers.get("content-type", "").startswith("image"):
+        s = io.BytesIO(flow.response.content)
+        img = Image.open(s).rotate(180)
+        s2 = io.BytesIO()
+        img.save(s2, "png")
+        flow.response.content = s2.getvalue()
+        flow.response.headers["content-type"] = "image/png"