我正在尝试将文本文件(也尝试过PDF等)上载到Salesforce。 文本文件包含“ hello world”。
这是我正在使用的代码
def putFile(sf, libname, filen):
file_name=os.path.basename(filen)
libId=libraryExists(sf, libname)
contentDocumentId = getContentDocumentId(sf, libname, file_name)
if not libId:
print(f"Provided library '{libname}' does not exists")
return
with open(filen, "rb") as f:
bodyEncoded = base64.b64encode(f.read())
boundary = '----------------------------741e90d31eff'
headers = {
'Content-Type' : 'multipart/form-data; boundary=' + boundary
}
nonBinaryPart = '--'+boundary+'\nContent-Disposition: form-data; name="entity_content";\n'
nonBinaryPart += 'Content-Type: application/json;\r\n\r\n'
nonBinaryPart += json.dumps({
"ContentDocumentId" : contentDocumentId,
"ReasonForChange" : "Large file upload",
"PathOnClient" : file_name
})
nonBinaryPart += '\r\n\r\n'
header = '--'+boundary+'\nContent-Disposition: form-data; name="VersionData"; filename="'+file_name+'";\nContent-Type: application/octet-stream\r\n\r\n'
footer = '--'+boundary+'--'
headerEncoded = header
last4Bytes = bodyEncoded[len(bodyEncoded)-4:len(bodyEncoded)]
print(type(last4Bytes))
print(last4Bytes)
if last4Bytes.endswith(b'=='):
last4Bytes = last4Bytes[0:2] + b'0K'
bodyEncoded = bodyEncoded[0:len(bodyEncoded)-4] + last4Bytes
footerEncoded = footer
reqBody = headerEncoded+str(bodyEncoded)+footerEncoded
elif last4Bytes.endswith(b'='):
print('Ends with =')
last4Bytes = last4Bytes[0:3] + b'N'
bodyEncoded = bodyEncoded[0:len(bodyEncoded)-4] + last4Bytes
footer = '\n' + footer;
footerEncoded = footer
reqBody = headerEncoded+str(bodyEncoded)+footerEncoded
else:
footer = '\r\n' + footer
footerEncoded = footer
reqBody = headerEncoded+str(bodyEncoded)+footerEncoded
reqBody = nonBinaryPart + reqBody
print('==================================================')
print(reqBody)
print('==================================================')
res = sf.contentVersion.create(reqBody, headers)
print(res)
print('Now downloading it...')
os.system('rm -f ' + filen + '_downloaded')
getFile(sf, contentDocumentId, filen + '_downloaded', './' )
print('Downloaded.')
os.system('md5sum ' + filen)
os.system('md5sum ' + filen + '_downloaded')
这将导致以下请求正文似乎符合Salesforce准则: https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/dome_sobject_insert_update_blob.htm
标题:
Content-Type:multipart / form-data; boundary =“ ---------------------------- 741e90d31eff” 接受:application / json
请求正文:
-------------------------------- 741e90d31eff 内容处置:表单数据; name =“ entity_content”; 内容类型:application / json;
{“ ContentDocumentId”:“ 0699E000000lKbLQAU”,“ ReasonForChange”:“上传大文件”,“ PathOnClient”:“ hello_world.txt”}
-------------------------------- 741e90d31eff 内容处置:表单数据; name =“ VersionData”; filename =“ hello_world.txt”; 内容类型:application / octet-stream
b'aGVsbG8gd29ybGQK' ------------------------------ 741e90d31eff-
答案 0 :(得分:0)
就像您的代码显示bodyEncoded = base64.b64encode(f.read())
一样,该文件以base64编码形式发送。下载文件后,需要对其进行解码,以恢复其原始的“可读”值。
注意:就像您的评论所说,文件的内容为b'aGVsbG8gd29ybGQK'
,其中b
表示base64编码的字符串,另一部分是编码的值,您也可以使用base64decode之类的在线工具进行编码,该工具将显示字符串恰好是hello world
答案 1 :(得分:0)
最后我明白了。因此,要以多部分表单数据的形式上传到Salesforce: 1.没有base64编码!!! 它需要保持为二进制 2.我的错误是我试图将字符串连接到字节。 因此,构建多部分消息的非二进制部分并将其编码为二进制:
nonbinaryPart.encode()