fix(client): urlencode filename before uploading file, fix #292 (#294)

* fix(client): urlencode file name

#292

* refactor(client): move encoding filename to post method

* test(client): split client.post test into unit test and integration test

* test(windows): set PYTHONIOENCODING to utf-8

* fix(client): check name attribute before urlencoding filename

* test(client): create a fake picture file for related tests

* style(client): correct coding style

* fix(client): urlencode filenames for all files in "files" before upload

* refactor(client): refactor urlencode to reduce block nest and make it more pythonic

* style(client): fix client style problem

appveyor.yml

@@ -15,6 +15,7 @@ install:
   - redis-server --service-start
   - set DATABASE_MYSQL_USERNAME=root
   - set DATABASE_MYSQL_PASSWORD=Password12!
+  - set PYTHONIOENCODING=utf-8
 before_test:
   - ps: $env:MYSQL_PWD="Password12!"
   - ps: $cmd = '"C:\Program Files\MySQL\MySQL Server 5.7\bin\mysql" -e "create database werobot;" --user=root'
@@ -31,4 +32,4 @@ on_failure:
 notifications:
 - provider: Slack
   incoming_webhook:
-    secure: OUWL/ky2abFxup5CTKyGrmQRdqAE/TU5To/6bxxvS6GRaV6/JdyKyfxZHwnB1HOIg805obLeC4ngnSNEUd87to9JLSerBUb5b3VjYieuJVY=
+    secure: OUWL/ky2abFxup5CTKyGrmQRdqAE/TU5To/6bxxvS6GRaV6/JdyKyfxZHwnB1HOIg805obLeC4ngnSNEUd87to9JLSerBUb5b3VjYieuJVY=