我正在使用带有 Indy 10 的 Delphi XE2 来访问 Ubuntu One API。到现在为止还挺好。如所述,我能够从云端获取 OAuth 令牌。现在我想开始使用 API(如前所述):
function TUbuntuOneApi.DoRequest(const URL: String): String;
var
RequestParams: TStringList;
HeaderIndex: Integer;
const
OAuthAuthorisationHeader = 'OAuth realm="", oauth_version="%s", oauth_nonce="%s", oauth_timestamp="%s", oauth_consumer_key="%s", oauth_token="%s", oauth_signature_method="%s", oauth_signature="%s"';
begin
RequestParams := SignOAuthRequestParams(URL, fOAuthAppToken, fOAuthAccessToken);
{ OAuth realm="", oauth_version="1.0",
oauth_nonce="$nonce", oauth_timestamp="$timestamp",
oauth_consumer_key="$consumer_key", oauth_token="$token",
oauth_signature_method="PLAINTEXT",
oauth_signature="$consumer_secret%26$token_secret"
}
HeaderIndex := IdHTTP.Request.CustomHeaders.IndexOfName('Authorization');
if HeaderIndex >= 0 then
begin
IdHTTP.Request.CustomHeaders.Delete(HeaderIndex);
end;
// Solving: http://stackoverflow.com/questions/7323036/twitter-could-not-authenticate-with-oauth-401-error
IdHTTP.Request.CustomHeaders.FoldLines := false;
IdHTTP.Request.CustomHeaders.AddValue('Authorization', Format(OAuthAuthorisationHeader, [
TIdURI.URLDecode(RequestParams.Values['oauth_version']),
TIdURI.URLDecode(RequestParams.Values['oauth_nonce']),
TIdURI.URLDecode(RequestParams.Values['oauth_timestamp']),
TIdURI.URLDecode(RequestParams.Values['oauth_consumer_key']),
TIdURI.URLDecode(RequestParams.Values['oauth_token']),
TIdURI.URLDecode(RequestParams.Values['oauth_signature_method']),
TIdURI.URLDecode(RequestParams.Values['oauth_signature'])
]));
// Execute
Result := IdHTTP.Get(URL);
RequestParams.Free;
end;
function TUbuntuOneApi.Test: String;
begin
//Result := DoRequest('https://one.ubuntu.com/api/file_storage/v1');
Result := DoRequest('https://one.ubuntu.com/api/account/');
end;
调用https://one.ubuntu.com/api/file_storage/v1会导致“401 UNAUTHORIZED”。调用https://one.ubuntu.com/api/account/会导致“400 BAD REQUEST”。OAuth 库来自SourceForge并与 Dropbox 一起使用(如果 OAuth-Params 在查询字符串中,Dropbox 接受它们)。令牌是正确且有效的。我究竟做错了什么?
顺便提一句:
function SignOAuthRequestParams(const URL: String; OAuthAppToken, OAuthAccessToken: TOAuthToken): TStringList;
var
Consumer: TOAuthConsumer;
ARequest: TOAuthRequest;
Response: String;
HMAC: TOAuthSignatureMethod;
begin
HMAC := TOAuthSignatureMethod_PLAINTEXT.Create;
// Consumer erzeugen
Consumer := TOAuthConsumer.Create(OAuthAppToken.Key, OAuthAppToken.Secret);
// Request erzeugen
ARequest := TOAuthRequest.Create(URL);
ARequest := ARequest.FromConsumerAndToken(Consumer, OAuthAccessToken, URL);
ARequest.Sign_Request(HMAC, Consumer, OAuthAccessToken);
Result := TStringList.Create;
Result.AddStrings(ARequest.Parameters);
ARequest.Free;
Consumer.Free;
HMAC.Free;
end;