此处已经在Flaks从别处下载了个640×640的大图：
#download avatar image avatarUrl = respUserInfoDict[‘headimgurl’] app.logger.debug("avatarUrl=%s", avatarUrl) avatarReq = requests.get(avatarUrl) app.logger.debug("avatarReq=%s", avatarReq) staticFolder = app.static_folder app.logger.debug("staticFolder=%s", staticFolder) avatartName = openid + ".png" app.logger.debug("avatartName=%s", avatartName) avatarStaticPath = os.path.join("img/avatar", avatartName) app.logger.debug("avatarStaticPath=%s", avatarStaticPath) avatarFullPath = os.path.join(staticFolder, avatarStaticPath) app.logger.debug("avatarFullPath=%s", avatarFullPath) with open(avatarFullPath, ‘wb’) as f: f.write(avatarReq.content) f.close() app.logger.debug("downloaded avatar=%s ok", avatarUrl) |
现在希望压缩成60×60的小图片。
Flask python image resize
jmagnusson/Flask-Resize: Flask extension for resizing, cropping and caching images.
Flask-Images — Flask-Images 2.1.1 documentation
Flask-Resize — Flask-Resize 0.6.0 documentation
Configuration — Flask-Resize 0.6.0 documentation
Flask-Images 1.1.3 : Python Package Index
Flask-Resize 0.6.0 : Python Package Index
Flask-Images 2.1.2 : Python Package Index
API Documentation — Flask-Resize 0.6.0 documentation
python – Flask-Images is not working – Stack Overflow
去试试：
Flask-Images
(SIPEvents) ➜ SIPEvents pip install Flask-Images Collecting Flask-Images Downloading Flask-Images-2.1.2.tar.gz Requirement already satisfied (use –upgrade to upgrade): Flask>=0.9 in /root/Envs/SIPEvents/lib/python2.7/site-packages (from Flask-Images) Requirement already satisfied (use –upgrade to upgrade): itsdangerous in /root/Envs/SIPEvents/lib/python2.7/site-packages (from Flask-Images) Collecting PillowCase (from Flask-Images) Downloading pillowcase-2.0.0.tar.gz Requirement already satisfied (use –upgrade to upgrade): Jinja2>=2.4 in /root/Envs/SIPEvents/lib/python2.7/site-packages (from Flask>=0.9->Flask-Images) Requirement already satisfied (use –upgrade to upgrade): Werkzeug>=0.7 in /root/Envs/SIPEvents/lib/python2.7/site-packages (from Flask>=0.9->Flask-Images) Requirement already satisfied (use –upgrade to upgrade): click>=2.0 in /root/Envs/SIPEvents/lib/python2.7/site-packages (from Flask>=0.9->Flask-Images) Collecting pillow (from PillowCase->Flask-Images) Downloading Pillow-3.3.1-cp27-cp27m-manylinux1_x86_64.whl (5.6MB) 100% |████████████████████████████████| 5.6MB 58kB/s Requirement already satisfied (use –upgrade to upgrade): MarkupSafe in /root/Envs/SIPEvents/lib/python2.7/site-packages (from Jinja2>=2.4->Flask>=0.9->Flask-Images) Building wheels for collected packages: Flask-Images, PillowCase Running setup.py bdist_wheel for Flask-Images … done Stored in directory: /root/.cache/pip/wheels/c8/4c/c4/18ba1b7e9aebf7aec7059a3a10921aa551b89106f81a95aff7 Running setup.py bdist_wheel for PillowCase … done Stored in directory: /root/.cache/pip/wheels/57/c6/7b/c62d4c593151f44d9c12f46cf06d1a1a62a8d30af97c9aad2c Successfully built Flask-Images PillowCase Installing collected packages: pillow, PillowCase, Flask-Images Successfully installed Flask-Images-2.1.2 PillowCase-2.0.0 pillow-3.3.1 |
然后需要去设置：
app的secret_key
所以先要去搞清楚：
［已解决］Flask的app的secret_key的含义和作用
然后接着去试试
期间出现：
结果代码：
<img class="initiator-avatar" src="{{ url_for(‘images’, width=64, height=64, quality=95, filename = todayEvent.user.avatar_static_path ) }}"> |
没有起效果
图片没有加载出来
flask-images not work
python – Flask not serving pictures – Stack Overflow
Quickstart — Flask Documentation (0.11)
python 2.7 – Flask-Images does not work – Stack Overflow
Python flask jinja image file not found – Stack Overflow
python – Cannot show image from STATIC_FOLDER in Flask template – Stack Overflow
python – Flask-webage background image doesnt work – Stack Overflow
how to set IMAGES_PATH flask-images
flask-images IMAGES_PATH
flask flask-images
flask url_for(‘images’
Warn when IMAGES_PATH is a string · Issue #29 · mikeboers/Flask-Images
Flask Configuration
flask images IMAGES_PATH
Flask-Images 2.0.0 : Python Package Index
Flask-Images/core.py at master · mikeboers/Flask-Images
app.config.setdefault(‘IMAGES_PATH’, [‘static’])
－》好像默认的Flask的app的config中的IMAGES_PATH默认已经设置为我此处想要设置的：
static
了。
URL normalization on Windows · Issue #25 · mikeboers/Flask-Images
Improve docs re: configuration and examples · Issue #22 · mikeboers/Flask-Images
－》提到了：IMAGES_PATH其实是一个list
－》才注意到：
官网文档：
Flask-Images — Flask-Images 2.1.1 documentation
中的值是：
“IMAGES_PATH
A list of paths to search for images (relative to app.root_path); e.g. [‘static/uploads’]”
其中提到了：
A list of paths
以及，比如：
[‘static/uploads’]
－》也看到了此处作者的代码：
Flask-Images/core.py at master · mikeboers/Flask-Images
是：
def find_img(self, local_path): local_path = os.path.normpath(local_path.lstrip(‘/’)) for path_base in current_app.config[‘IMAGES_PATH’]: path = os.path.join(current_app.root_path, path_base, local_path) if os.path.exists(path): return path |
－》很明显，IMAGES_PATH是个list，而不是单个的path的string
而我此处，却由于自己的
IMAGES_PATH = "static" |
而导致无法正确的搜索路径，所以找不到图片，所以无法显示缩放后的图了。。。
所以去改为默认的：
IMAGES_PATH = ["static"] |
然后再去试试
最后，终于可以正常显示压缩后的图片了：
［总结］
此处，使用Flask-Images这个Flask插件，来完成图片等缩放显示
具体步骤是：
1.安装
pip install Flask-Images
2.设置app的secret_key
/Users/crifan/dev/dev_root/daryun/SIPEvents/sourcecode/flask/instance/config.py
FLASK_SECRET_KEY = ‘^\x90\xcd-N\xc2:z\xee\xfckHOUjy\xe0\x83b\x12\x1f\xe3Wb’ |
其中此处的secret_key是用Python的os.urandom(24)去生成的：
➜ ~ python Python 2.7.10 (default, Oct 23 2015, 19:19:21) [GCC 4.2.1 Compatible Apple LLVM 7.0.0 (clang-700.0.59.5)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> import os >>> os.urandom(24) ‘^\x90\xcd-N\xc2:z\xee\xfckHOUjy\xe0\x83b\x12\x1f\xe3Wb’ >>> |
/Users/crifan/dev/dev_root/daryun/SIPEvents/sourcecode/flask/sipevents/__init__.py
app.secret_key = app.config[‘FLASK_SECRET_KEY’] |
3.使用Flask-Images
/Users/crifan/dev/dev_root/daryun/SIPEvents/sourcecode/flask/sipevents/__init__.py
from flask_images import Images images = Images(app) |
html中：
/Users/crifan/dev/dev_root/daryun/SIPEvents/sourcecode/flask/sipevents/templates/index.html
<img class="initiator-avatar" src="{{ url_for(‘images’, width=64, height=64, quality=95, filename = todayEvent.user.avatar_static_path ) }}"> |
即可，自动压缩显示出对应的图片了。
4.如果想要测试图片被不同模式压缩后的显示效果，可以参考官网的示例：
转载请注明：在路上 » ［已解决］Flask中去压缩并显示图片