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將pdf傳遞給Salesforce中的IBM watson時出現“ 415:不支持媒體”錯誤

[英]getting “415:Media not supported” Error when passing pdf to IBM watson in Salesforce

我打算將IBM Watson Document Conversion服務與Salesforce集成。

從那里我無法將我的pdf文件直接發送到Watson,並且我Media Type not supported

我也收到此錯誤:

{
  "code" : 500 ,
  "error" : "Server Error" ,
  "description" : "2017-07-18T06:02:19-04:00, Error WATSNGWERR-0x0113001c occurred when accessing https://gateway.watsonplatform.net/document-conversion/api/v1/convert_document?version=2015-12-15&config="{"conversion_target":"answer_units"}", Tran-Id: gateway-dp02-1967135880 - Watson Gateway Error"
}  

這是我正在使用的代碼:

public class Resume {
  String boundary = '----------------------------741e90d31eff';

  public string id{get;set;}
  public string content{get;set;}
  Transient public Attachment att{set;get;}

  public Resume(ApexPages.StandardController controller) {
    id=ApexPages.currentPage().getParameters().get('id');
    att=new Attachment();
    att=[Select Id,ParentId, Name,body,ContentType From Attachment where ParentId=:id limit 1];
    content=String.valueOf(att.body);

    System.debug('---->' + content);
    String header = '--' + boundary + '\nContent-Disposition: form-data; name="att"; filename="'+att.name+'";\nContent-Type: application/pdf';
    String footer = '--' + boundary + '--';
    String headerEncoded =
    EncodingUtil.base64Encode(Blob.valueOf(header+'\r\n\r\n'));
    String bodyEncoded = EncodingUtil.base64Encode(att.body);
    Blob bodyBlob = null;
    String last4Bytes =
    bodyEncoded.substring(bodyEncoded.length() - 4, bodyEncoded.length());
    while (headerEncoded.endsWith('=')){
      header+=' ';
      headerEncoded = EncodingUtil.base64Encode(Blob.valueOf(header+'\r\n\r\n'));
    }

    if (last4Bytes.endsWith('==')) {
      last4Bytes = last4Bytes.substring(0,2) + '0K';
      bodyEncoded = bodyEncoded.substring(0,bodyEncoded.length()-4) + last4Bytes;
      String footerEncoded = EncodingUtil.base64Encode(Blob.valueOf(footer));
      bodyBlob = EncodingUtil.base64Decode(headerEncoded + bodyEncoded + footerEncoded);
    } else if (last4Bytes.endsWith('=')) {
      last4Bytes = last4Bytes.substring(0,3) + 'N';
      bodyEncoded = bodyEncoded.substring(0,bodyEncoded.length()-4) + last4Bytes;
      footer = '\n' + footer;
      String footerEncoded = EncodingUtil.base64Encode(Blob.valueOf(footer));
      bodyBlob = EncodingUtil.base64Decode(headerEncoded + bodyEncoded + footerEncoded);
    } else {
      footer = '\r\n' + footer;
      String footerEncoded = EncodingUtil.base64Encode(Blob.valueOf(footer));
      bodyBlob = EncodingUtil.base64Decode(headerEncoded + bodyEncoded + footerEncoded);
    }

    String configAsString ='\"conversion_target:answer_units\"';
    Http h = new Http();
    HttpRequest request = new HttpRequest();
    request.setMethod('POST');
    request.setHeader('Content-Type','multipart/form-data; boundary=' + boundary);

    String username= 'DOCUMENT-CONVERSION-USERNAME';
    String password= 'DOCUMENT-CONVERSION-PASSWORD';
    request.setHeader('Authorization', 'Basic ' + EncodingUtil.base64Encode(blob.valueOf(username + ':' + password)));

    request.setEndpoint('https://gateway.watsonplatform.net/document-conversion/api/v1/convert_document?version=2015-12-15&config='+configAsString);
    request.setBodyAsBlob(bodyBlob);
    request.setCompressed(true);
    HttpResponse response = h.send(request);
    System.debug(response.getBody());
  }
}

您正在將config作為查詢參數發送,但是它應該在正文中。

這是curl命令,可以執行您想做的事情:

curl -X POST \
  -u "{username}":"{password}" \
  -F config="{\"conversion_target\":\"answer_units\"}" \
  -F "file=@sample.pdf;type=application/pdf" \
"https://gateway.watsonplatform.net/document-conversion/api/v1/convert_document?version=2015-12-15"

我也認為您創建身體的方式存在錯誤。 我的團隊構建了一個SDK,以在Salesforce環境中使用Watson API。 我建議你看看。

如果您無法將SDK部署到您的Salesforce組織(很多代碼),請復制IBMWatsonMultipartBody.cls類中的代碼。 它將幫助您將Attachment編碼為base64,以便可以將其結尾為Watson。


更新:不建議使用文檔轉換服務,但該服務的功能已得到增強,並已遷移到發現服務

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