将字符串作为图片上传到trello api

Question

我正在试着上传一个图像文件到trello api。下面的代码完成了这项工作，但文件是以文本字符串的形式上传的。

C:/file保存一个文本字符串。如果我把这个字符串放到像https://codebeautify.org/base64-to-image-converter这样的在线base64转换器中运行，我会得到一个很好的png图像。

API文档指定我可以将filename、mimetype设置为字符串，并将文件附加为multipart/form-data Format: binary

https://developer.atlassian.com/cloud/trello/rest/api-group-cards/#api-cards-id-attachments-post

如何在上传前将此图像转换为图像？

import requests
import base64

key = "xxx"
token = "yyy"

url = "https://api.trello.com/1/cards/618390bbdc3cb10550c9912b/attachments"

pathToFile ="C:/file"

f = open(pathToFile, "r")
file = f.read()
f.close()

message_bytes = file.encode('ascii')
base64_bytes = base64.b64encode(message_bytes)
base64_message = base64_bytes.decode('ascii')

response = requests.post(url, params={'token':token,'key':key, 'mimeType ':'png', 'name':'fisk.png'}, files={'file':base64_message})

Answer 1

使用这篇来自https://community.atlassian.com/t5/Trello-questions/Mime-types-of-attachments-uploaded-to-Trello/qaq-p/1369920的帖子

我最终得到了这段代码，它也处理mimetype corect：

import requests
import base64

def attachFileToCardID(key,token, trelloCardID, theFile, theName, theMIMEtype):
    imgdata = base64.b64decode(file)
    resp = requests.post("https://trello.com/1/cards/{}/attachments".format(trelloCardID),
                         params={'key': key, 'token': token},
                         files={'file': (theName, imgdata, theMIMEtype)})
    return resp.status_code

key = "xxx"
token = "yyy"

pathToFile ="C:/file.txt"

f = open(pathToFile, "r")
file = f.read()
f.close()

x = attachFileToCardID(key,token,'zzz', file, 'filename.png','image/png')