Beispiele für POST-Anfragen an den Datei-Service

Die folgenden C#-Beispiele zeigen, wie Sie POST-Anfragen für die Arbeit mit Dateien auf dem Server verwenden.

Dateien vom Server laden

Um eine Datei vom Server zu laden, erstellen Sie eine Serveranfrage an AppServerURL + "/FlexiCapture12/Server/FileService/v1". Verwenden Sie die POST-Methode und den Content-Type application/x-www-form-urlencoded. Speichern Sie die Ergebnisse in einer neuen Datei. Request-Body und C#-Methode:

"Action=Load" +"&sessionId=" + session + "&objectType=" + objectType + "&projectId=" + projectId + "&batchId=" + batchId + "&objectId=" + objectId + "&version=" + version + "&streamName=" + streamName
static private CredentialCache basicAuthenticationCredentialCache = null;
public static List<byte> POSTLoadFile(string AppServerURL, int session, int projectId, int batchId, int objectType, int objectId, int version, int parentId, string streamName)
       {
            List<byte> result = new List<byte>();
            HttpWebResponse response = null;
            Stream responseStream = null;
            BinaryReader reader = null;
            try
            {
                // Anfrage erstellen
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(AppServerURL + "/FlexiCapture12/Server/FileService/v1");
                request.Method = "POST";
                // Authentifizierung beim Verbinden mit dem Webservice einrichten
                if (basicAuthenticationCredentialCache != null)
                {
                    request.Credentials = basicAuthenticationCredentialCache;
                }
                else
                {
                    request.UseDefaultCredentials = true;
                }
                request.ContentType = "application/x-www-form-urlencoded";
                string postData = "Action=Load" +
                    "&sessionId=" + session +
                    "&objectType=" + objectType +
                    "&projectId=" + projectId +
                    "&batchId=" + batchId +
                    "&parentId=" + parentId +
                    "&objectId=" + objectId +
                    "&version=" + version +
                    "&streamName=" + streamName;
                StreamWriter writer = new StreamWriter(request.GetRequestStream());
                writer.Write(postData);
                writer.Close();                  
           
                // Antwort empfangen
                response = (HttpWebResponse)request.GetResponse();
                responseStream = response.GetResponseStream();
                reader = new BinaryReader(responseStream);
                int responseStreamLength = 0;
                while (true)
                {
                    try
                    {
                        result.Add(reader.ReadByte());
                        responseStreamLength++;
                    }
                    catch (EndOfStreamException)
                    {
                        break;
                    }
                }
                reader.Close();
                responseStream.Close();
                response.Close();               
            }
            if (response != null) response.Close();
            if (responseStream != null) responseStream.Close();
            if (reader != null) reader.Close();
            return result;
        }

Dateien auf den Server hochladen

Öffnen Sie zunächst eine vorhandene Datei und lesen Sie die darin enthaltenen Daten. Rufen Sie mithilfe von Encoding.Default den content-String aus der Binärdatei ab. Um die Datei zu speichern, erstellen Sie eine Serveranfrage an AppServerURL + "/FlexiCapture12/Server/FileService/v1". Verwenden Sie die POST-Methode und den Content-Type multipart/form-data. Request-Body und C#-Methode:

"\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"Action\"\r\n\r\nSave" +
"\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"objectType\"\r\n\r\n" + objectType +
"\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"sessionId\"\r\n\r\n" + session +
"\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"projectId\"\r\n\r\n" + projectId +
"\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"batchId\"\r\n\r\n" + batchId +
"\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"objectId\"\r\n\r\n" + objectId +
"\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"version\"\r\n\r\n" + version +
"\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"streamName\"\r\n\r\n" + streamNameInBase64 +            // Name des binären Streams in Base64
"\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"blob\";filename=\"filename.txt\"\r\nContent-Type: application/octet-stream\r\nContent-Transfer-Encoding: binary\r\n\r\n"+                                       // der Wert des filename-Parameters hat keinen Einfluss auf den Request selbst
content +                                                                        //Daten, die auf den Server hochgeladen werden
"\r\n--" + requestId + "--\r\n";
static private CredentialCache basicAuthenticationCredentialCache = null;
// der „content"-String sollte mithilfe von Encoding.Default aus der Binärdatei gewonnen werden
        public static List<byte> POSTSaveFile(string AppServerURL, int session, int projectId, int batchId, int objectType, int objectId, int version, string streamName, string content)
        {
            List<byte> result = new List<byte>();
            HttpWebResponse response = null;
            Stream responseStream = null;
            StreamReader reader = null;
            int requestId = Environment.TickCount;
            try
            {
                // Request erstellen
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(AppServerURL + "/FlexiCapture12/Server/FileService/v1");
                request.Method = "POST";
                // Authentifizierung beim Verbinden mit dem Webservice einrichten
                if (basicAuthenticationCredentialCache != null)
                {
                    request.Credentials = basicAuthenticationCredentialCache;
                }
                else
                {
                    request.UseDefaultCredentials = true;
                }
                request.ContentType = "multipart/form-data, boundary=" + requestId;
                byte[] streamNameInBytes = Encoding.Unicode.GetBytes(streamName);
                UnicodeEncoding UTFencofing = new UnicodeEncoding();
                string postData = "\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"Action\"\r\n\r\nSave" +
                    "\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"objectType\"\r\n\r\n" + objectType +
                    "\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"sessionId\"\r\n\r\n" + session +
                    "\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"projectId\"\r\n\r\n" + projectId +
                    "\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"batchId\"\r\n\r\n" + batchId +
                    "\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"objectId\"\r\n\r\n" + objectId +
                    "\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"version\"\r\n\r\n" + version +
                    "\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"streamName\"\r\n\r\n" + Convert.ToBase64String(streamNameInBytes) +
                    "\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"blob\";filename=\"filename.txt\"\r\nContent-Type: application/octet-stream\r\nContent-Transfer-Encoding: binary\r\n\r\n";
                postData += content;
                postData += "\r\n--" + requestId + "--\r\n";
                StreamWriter writer = new StreamWriter(request.GetRequestStream(), Encoding.Default);
                writer.Write(postData);
                writer.Close();  
                // Antwort empfangen
                response = (HttpWebResponse)request.GetResponse();
                responseStream = response.GetResponseStream(); 
                reader = new StreamReader(responseStream);
                reader.Close();
                responseStream.Close();
                response.Close();
            }
            if (response != null) response.Close();
            if (responseStream != null) responseStream.Close();
            if (reader != null) reader.Close();
            return result;
        }

Prüfsumme abrufen

Um eine Prüfsumme abzurufen, erstellen Sie eine Serveranfrage an AppServerURL + "/FlexiCapture12/Server/FileService/v1". Verwenden Sie die POST-Methode und den Content-Type application/x-www-form-urlencoded. Request-Body und C#-Methode:

"Action=Checksum" + "&sessionId=" + session + "&objectType=" + objectType + "&projectId=" + projectId + "&batchId=" + batchId + "&objectId=" + objectId + "&version=" + version + "&streamName=" + streamName
static private CredentialCache basicAuthenticationCredentialCache = null;
public static List<byte> POSTGetChecksum(string AppServerURL, int session, int projectId, int batchId, int objectType, int objectId, int version, string streamName)
        {
   List<byte> result = new List<byte>();
   HttpWebResponse response = null;
   Stream responseStream = null;
   BinaryReader reader = null;
   try
            {
                // Anfrage erstellen
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(AppServerURL + "/FlexiCapture12/Server/FileService/v1");
                request.Method = "POST";
                // Authentifizierung beim Verbinden mit dem Webservice einrichten
    if (basicAuthenticationCredentialCache != null)
    {
     request.Credentials = basicAuthenticationCredentialCache;
    }
    else
    {
     request.UseDefaultCredentials = true;
    }
    request.ContentType = "application/x-www-form-urlencoded";
    string postData = "Action=Checksum" +
     "&sessionId=" + session +
     "&objectType=" + objectType +
     "&projectId=" + projectId +
     "&batchId=" + batchId +
     "&objectId=" + objectId +
     "&version=" + version +
     "&streamName=" + streamName;
    StreamWriter writer = new StreamWriter(request.GetRequestStream());
    writer.Write(postData);
    writer.Close();
                // Antwort empfangen
    response = (HttpWebResponse)request.GetResponse();
    responseStream = response.GetResponseStream();
    reader = new BinaryReader(responseStream);
    int responseStreamLength = 0;
    while (true)
    {
     try
     {
      result.Add(reader.ReadByte());
      responseStreamLength++;
     }
     catch (EndOfStreamException)
     {
      break;
     }
    }
    reader.Close();
    responseStream.Close();
    response.Close();
   }
   if (response != null) response.Close();
   if (responseStream != null) responseStream.Close();
   if (reader != null) reader.Close();
   return result;
  }

Laden in Teilen (Ändern einer vorhandenen Datei)

Sie können nur eine Datei ändern, die bereits auf dem Server vorhanden ist. Erstellen Sie die Datei daher zuerst mit der Methode POSTSaveFile. Um die Datei zu ändern, senden Sie eine Serveranfrage an AppServerURL + "/FlexiCapture12/Server/FileService/v1". Verwenden Sie die POST-Methode und den Content-Type multipart/form-data. Request-Body und C#-Methode:

"\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"Action\"\r\n\r\nAppend" +
"\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"objectType\"\r\n\r\n" + objectType +
"\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"sessionId\"\r\n\r\n" + session +
"\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"projectId\"\r\n\r\n" + projectId +
"\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"batchId\"\r\n\r\n" + batchId +
"\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"objectId\"\r\n\r\n" + objectId +
"\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"version\"\r\n\r\n" + version +
"\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"streamName\"\r\n\r\n" + streamNameInBase64 +
"\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"blob\";filename=\"filename.txt\"\r\nContent-Type: application/octet-stream\r\nContent-Transfer-Encoding: binary\r\n\r\n" +
content +                                                                                                                              //dieser String sollte auf die gleiche Weise wie im vorherigen Beispiel ermittelt werden
"\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"offset\"\r\n\r\n" + offset +            //der Versatz vom Anfang der Datei, an dem der Eintrag beginnt
"\r\n--" + requestId + "--\r\n";
static private CredentialCache basicAuthenticationCredentialCache = null;
// Der String "content" sollte mithilfe von Encoding.Default aus der Binärdatei ermittelt werden
        // Hinweis: Es können nur Daten an eine bereits vorhandene Datei angehängt werden, d. h. die Datei muss zunächst mit der Methode POSTSaveFile erstellt werden
        public static List<byte> POSTAppendFile(string AppServerURL, int session, int projectId, int batchId, int objectType, int objectId, int version, string streamName, string content, int offset)
        {
            List<byte> result = new List<byte>();
            HttpWebResponse response = null;
            Stream responseStream = null;
            StreamReader reader = null;
            int requestId = Environment.TickCount;
            try
            {
                // Anfrage erstellen
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(AppServerURL + "/FlexiCapture12/Server/FileService/v1");
                request.Method = "POST";
                // Authentifizierung für die Verbindung mit dem Webservice einrichten
                if (basicAuthenticationCredentialCache != null)
                {
                    request.Credentials = basicAuthenticationCredentialCache;
                }
                else
                {
                    request.UseDefaultCredentials = true;
                }
                request.ContentType = "multipart/form-data, boundary=" + requestId;
                byte[] streamNameInBytes = Encoding.Unicode.GetBytes(streamName);
                UnicodeEncoding UTFencofing = new UnicodeEncoding();
                string postData = "\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"Action\"\r\n\r\nAppend" +
                    "\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"objectType\"\r\n\r\n" + objectType +
                    "\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"sessionId\"\r\n\r\n" + session +
                    "\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"projectId\"\r\n\r\n" + projectId +
                    "\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"batchId\"\r\n\r\n" + batchId +
                    "\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"objectId\"\r\n\r\n" + objectId +
                    "\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"version\"\r\n\r\n" + version +
                    "\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"streamName\"\r\n\r\n" + Convert.ToBase64String(streamNameInBytes) +
                    "\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"blob\";filename=\"filename.txt\"\r\nContent-Type: application/octet-stream\r\nContent-Transfer-Encoding: binary\r\n\r\n";
                postData += content;
                postData += "\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"offset\"\r\n\r\n" + offset;
                postData += "\r\n--" + requestId + "--\r\n";
                StreamWriter writer = new StreamWriter(request.GetRequestStream(), Encoding.Default);
                writer.Write(postData);
                writer.Close();
                // Antwort empfangen
                response = (HttpWebResponse)request.GetResponse();
                responseStream = response.GetResponseStream();
                // Antwort anzeigen
                reader = new StreamReader(responseStream); 
                reader.Close();
                responseStream.Close();
                response.Close();
            }
            if (response != null) response.Close();
            if (responseStream != null) responseStream.Close();
            if (reader != null) reader.Close();
            return result;
        }

​Dateien vom Server laden

​Dateien auf den Server hochladen

​Prüfsumme abrufen

​Laden in Teilen (Ändern einer vorhandenen Datei)

Dateien vom Server laden

Dateien auf den Server hochladen

Prüfsumme abrufen

Laden in Teilen (Ändern einer vorhandenen Datei)