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Examples
In this section, you will find the following POST request examples for working with files:
Loading by parts (modifying an existing file)
Loading files from the server
To load a file from the server, a server request should be created (AppServerURL + "/FlexiCapture12/Server/FileService/v1"). The request method should be POST, and the contents should be of the application/x-www-form-urlencoded type. The results should be recorded to a new file.
Request body:
"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 { // creating the request HttpWebRequest request = (HttpWebRequest)WebRequest.Create(AppServerURL + "/FlexiCapture12/Server/FileService/v1"); request.Method = "POST"; // authentication set up when connecting to the web service 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(); // receiving a response 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; }
Uploading files to the server
You need to open an existing file and read data from it Необходимо открыть существующий файл и прочитать из него данные (The "content" string should be obtained from the binary file using Encoding.Default).
To save the file, a server request should be created (AppServerURL + "/FlexiCapture12/Server/FileService/v1"). The request method should be POST, and the contents should be of the multipart/form-data type.
Request body:
"\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 of the binary stream 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"+ // the value of the filename parameter does not affect the request itself content + //data that is uploaded to the server "\r\n--" + requestId + "--\r\n"; static private CredentialCache basicAuthenticationCredentialCache = null; // the "content" string should be obtained from the binary file using Encoding.Default 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 { // creating the request HttpWebRequest request = (HttpWebRequest)WebRequest.Create(AppServerURL + "/FlexiCapture12/Server/FileService/v1"); request.Method = "POST"; // authentication set up when connecting to the web service 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(); // receiving a response 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; }
Getting a checksum
To get a checksum, a server request should be created (AppServerURL + "/FlexiCapture12/Server/FileService/v1"). The request method should be POST, and the contents should be of the application/x-www-form-urlencoded type.
Request body:
"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 { // creating the request HttpWebRequest request = (HttpWebRequest)WebRequest.Create(AppServerURL + "/FlexiCapture12/Server/FileService/v1"); request.Method = "POST"; // authentication set up when connecting to the web service 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(); // receiving a response 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; }
Loading by parts (modifying an existing file)
Important !Only a file that already exists on the server can be modified.
In order to modify the file, a server request should be created (AppServerURL + "/FlexiCapture12/Server/FileService/v1"). The request method should be POST, and the contents should be of the multipart/form-data type.
Request body:
"\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" + сontent + //this string should be obtained the same way as in the previous example "\r\n--" + requestId + "\r\ncontent-disposition: form-data; name=\"offset\"\r\n\r\n" + offset + //the offset from the beginning of the file, where the entry starts "\r\n--" + requestId + "--\r\n"; static private CredentialCache basicAuthenticationCredentialCache = null; // the "content" string should be obtained from the binary file using Encoding.Default // Note: you can only add to a file that already exists, meaning that you must first create a file using the POSTSaveFile method 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 { // creating a request HttpWebRequest request = (HttpWebRequest)WebRequest.Create(AppServerURL + "/FlexiCapture12/Server/FileService/v1"); request.Method = "POST"; // authentication set up when connecting to the web service 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(); // receiving a response response = (HttpWebResponse)request.GetResponse(); responseStream = response.GetResponseStream(); // displaying the response 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; }
1/14/2021 2:17:20 PM