allow attachment download from slackdump standard export (#180)

slackviewer/app.py

@@ -1,3 +1,5 @@
+import os
+
 import flask
 
 
@@ -26,6 +28,11 @@ def channel_name(name):
                                  no_external_references=app.no_external_references)
 
 
+@app.route("/channel/<name>/attachments/<attachment>")
+def channel_name_attachment(name, attachment):
+    return flask.send_file(os.path.join(flask._app_ctx_stack.path, name, "attachments", attachment))
+
+
 @app.route("/group/<name>/")
 def group_name(name):
     messages = flask._app_ctx_stack.groups[name]
@@ -44,6 +51,11 @@ def group_name(name):
                                  no_external_references=app.no_external_references)
 
 
+@app.route("/group/<name>/attachments/<attachment>")
+def group_name_attachment(name, attachment):
+    return flask.send_file(os.path.join(flask._app_ctx_stack.path, name, "attachments", attachment))
+
+
 @app.route("/dm/<id>/")
 def dm_id(id):
     messages = flask._app_ctx_stack.dms[id]
@@ -62,6 +74,11 @@ def dm_id(id):
                                  no_external_references=app.no_external_references)
 
 
+@app.route("/dm/<name>/attachments/<attachment>")
+def dm_name_attachment(name, attachment):
+    return flask.send_file(os.path.join(flask._app_ctx_stack.path, name, "attachments", attachment))
+
+
 @app.route("/mpim/<name>/")
 def mpim_name(name):
     messages = flask._app_ctx_stack.mpims.get(name, list())
@@ -80,6 +97,11 @@ def mpim_name(name):
                                  no_external_references=app.no_external_references)
 
 
+@app.route("/mpim/<name>/attachments/<attachment>")
+def mpim_name_attachment(name, attachment):
+    return flask.send_file(os.path.join(flask._app_ctx_stack.path, name, "attachments", attachment))
+
+
 @app.route("/")
 def index():
     channels = list(flask._app_ctx_stack.channels.keys())

slackviewer/main.py

@@ -22,6 +22,7 @@ def configure_app(app, archive, channels, no_sidebar, no_external_references, de
     reader = Reader(path)
 
     top = flask._app_ctx_stack
+    top.path = path
     top.channels = reader.compile_channels(channels)
     top.groups = reader.compile_groups()
     top.dms = reader.compile_dm_messages()