我有一个 Laravel 项目，但我想我知道如何将 Dynamic Web Twain ( https://www.dynamsoft.com/Products/WebTWAIN_Overview.aspx ) 合并到其中。
唯一的问题是我不太确定如何向扫描仪 UI 添加其他字段（如您在此处看到的：https ://demo.dynamsoft.com/dwt/online_demo_scan.aspx ）。
目前我的 Laravel 网站有一个工作上传部分到一个模型，我可以在其中提交附件，但是，附件表单中的字段包括“可见性”、“类型”、“上传位置”等。但我可以似乎不知道如何添加我已经使用的字段。
根据我的测试，这是一个非常有用的工具，如果我可以将它集成到我网站的各个方面，它会很好用。
我能找到的最接近的东西在这里：https ://developer.dynamsoft.com/dwt/api-reference/uploading-downloading/sethttpformfield
其中引用了此演示中所做的事情：https ://demo.dynamsoft.com/Samples/dwt/Scan-Documents-and-Upload-Them/DWT_Scan_Upload_Demo.html
如您所见，您可以使用“+”按钮添加字段名称和字段值，但我想在表单中添加一些立即可用的字段。我可能需要解决的另一个问题是，如果我使用这个演示并添加一个值和名称，这就是所有内容的发布方式，我不确定如何翻译成我的项目可以理解的内容。
-----------------------------23491353817351
Content-Disposition: form-data; name="This is a field"
Wow
-----------------------------23491353817351
Content-Disposition: form-data; name="RemoteFile"; filename="507-0.jpg"
Content-Type: application/octet-stream
ÿØÿà
这方面是我项目的必要部分，所以不幸的是，除了继续前进之外，没有真正的解决办法。
这是在线演示中的当前脚本：
Dynamsoft.WebTwainEnv.RegisterEvent('OnWebTwainReady', Dynamsoft_OnReady); // Register OnWebTwainReady event. This event fires as soon as Dynamic Web TWAIN is initialized and ready to be used
var DWObject, blankField = "", extrFieldsCount = 0, upload_returnSth = true;
var CurrentPathName = unescape(location.pathname);
var CurrentPath = CurrentPathName.substring(0, CurrentPathName.lastIndexOf("/") + 1);
var strHTTPServer = location.hostname;
var strActionPage;
var scriptLanguages = [
{ desc: "PHP", val: "php" },
{ desc: "PHP-MySQL", val: "phpMySQL" },
{ desc: "CSharp", val: "csharp" },
{ desc: "CSharp-MSSQL", val: "csMSSQL" },
{ desc: "VB.NET", val: "vbnet" },
{ desc: "VBNET-MSSQL", val: "vbnetMSSQL" },
{ desc: "JSP", val: "jsp" },
{ desc: "JSP-Oracle", val: "jspOracle" },
{ desc: "ASP", val: "asp" },
{ desc: "ASP-MSSQL", val: "aspMSSQL" },
{ desc: "ColdFusion", val: "cfm" },
{ desc: "CS-Azure", val: "csAzure" }
];
function languageSelected() {
if (document.getElementById("ddlLanguages").selectedIndex > 7)
upload_returnSth = false;
else
upload_returnSth = true;
if ([0, 2, 4, 6].indexOf(document.getElementById("ddlLanguages").selectedIndex) == -1) {
document.getElementById("extra-fields-div-id").style.display = 'none';
document.getElementById('div-extra-fields').style.display = 'none';
}
else {
document.getElementById("extra-fields-div-id").style.display = '';
if (document.getElementById('div-extra-fields').children.length > 1 ||
document.getElementById('div-extra-fields').children[0].children[0].value != '') {
document.getElementById('div-extra-fields').style.display = '';
}
}
}
function addAField() {
extrFieldsCount++;
if (extrFieldsCount == 3) {
document.getElementById('div-extra-fields').style.overflowY = 'scroll';
}
if (document.getElementById('div-extra-fields').style.display == "none")
document.getElementById('div-extra-fields').style.display = '';
else {
document.getElementById('div-extra-fields').appendChild(blankField);
blankField = document.getElementsByClassName('div-fields-item')[extrFieldsCount - 1].cloneNode(true);
}
}
function downloadPDFR() {
DCP_DWT_OnClickCloseInstall();
DWObject.Addon.PDF.Download(
CurrentPath + '/Resources/addon/Pdf.zip',
function () {/*console.log('PDF dll is installed');*/
},
function (errorCode, errorString) {
console.log(errorString);
}
);
}
function Dynamsoft_OnReady() {
blankField = document.getElementsByClassName('div-fields-item')[0].cloneNode(true);
DWObject = Dynamsoft.WebTwainEnv.GetWebTwain('dwtcontrolContainer'); // Get the Dynamic Web TWAIN object that is embeded in the div with id 'dwtcontrolContainer'
if (DWObject) {
DWObject.Width = 505;
DWObject.Height = 600;
for (var i = 0; i < scriptLanguages.length; i++)
document.getElementById("ddlLanguages").options.add(new Option(scriptLanguages[i].desc, i));
document.getElementById("ddlLanguages").options.selectedIndex = 2;
/*
* Make sure the PDF Rasterizer and OCR add-on are already installedsample
*/
if (!Dynamsoft.Lib.env.bMac) {
var localPDFRVersion = '';
if(Dynamsoft.Lib.product.bChromeEdition){
localPDFRVersion = DWObject._innerFun('GetAddOnVersion', '["pdf"]');
}
else {
localPDFRVersion = DWObject.getSWebTwain().GetAddonVersion("pdf");
}
if (localPDFRVersion != Dynamsoft.PdfVersion) {
var ObjString = [];
ObjString.push('<div class="p15" id="pdfr-install-dlg">');
ObjString.push('The <strong>PDF Rasterizer</strong> is not installed on this PC<br />Please click the button below to get it installed');
ObjString.push('<p class="tc mt15 mb15"><input type="button" value="Install PDF Rasterizer" onclick="downloadPDFR();" class="btn lgBtn bgBlue" /><hr></p>');
ObjString.push('<i><strong>The installation is a one-time process</strong> <br />It might take some time depending on your network.</i>');
ObjString.push('</div>');
Dynamsoft.WebTwainEnv.ShowDialog(400, 310, ObjString.join(''));
}
else {
/**/
}
}
}
}
function AcquireImage() {
if (DWObject) {
var bSelected = DWObject.SelectSource();
if (bSelected) {
var OnAcquireImageSuccess, OnAcquireImageFailure;
OnAcquireImageSuccess = OnAcquireImageFailure = function () {
DWObject.CloseSource();
};
DWObject.OpenSource();
DWObject.IfDisableSourceAfterAcquire = true; //Scanner source will be disabled/closed automatically after the scan.
DWObject.AcquireImage(OnAcquireImageSuccess, OnAcquireImageFailure);
}
}
}
function LoadImages() {
if (DWObject) {
DWObject.Addon.PDF.SetResolution(300);
DWObject.Addon.PDF.SetConvertMode(EnumDWT_ConverMode.CM_RENDERALL);
DWObject.LoadImageEx('', 5,
function () {
},
function (errorCode, errorString) {
alert('Load Image:' + errorString);
}
);
}
}
function OnHttpUploadSuccess() {
console.log('successful');
}
function OnHttpServerReturnedSomething(errorCode, errorString, sHttpResponse) {
//console.log(errorString);
var textFromServer = sHttpResponse;
_printUploadedFiles(textFromServer);
}
function _printUploadedFiles(info) {
//console.log(info);
if (info.indexOf('DWTUploadFileName') != -1) {
var url, _strPort;
DWObject.IfSSL = Dynamsoft.Lib.detect.ssl;
_strPort = location.port == "" ? 80 : location.port
url = 'http://' + location.hostname + ':' + location.port
if (Dynamsoft.Lib.detect.ssl == true) {
_strPort = location.port == "" ? 443 : location.port;
url = 'https://' + location.hostname + ':' + location.port
}
var savedIntoToDB = false, imgIndexInDB = "-1";
if (info.indexOf("DWTUploadFileIndex:") != -1) {
savedIntoToDB = true;
imgIndexInDB = info.substring(info.indexOf('DWTUploadFileIndex') + 19, info.indexOf('DWTUploadFileName'));
//console.log(imgIndexInDB);
}
var fileName = info.substring(info.indexOf('DWTUploadFileName') + 18, info.indexOf('UploadedFileSize'));
var fileSize = info.substr(info.indexOf('UploadedFileSize') + 17);
if (savedIntoToDB) {
if (info.indexOf('CSHARP') != -1) {
url += CurrentPath + 'action/csharp-db.aspx?imgID=' + imgIndexInDB;
}
else if (info.indexOf('VBNET') != -1) {
url += CurrentPath + 'action/vbnet-db.aspx?imgID=' + imgIndexInDB;
}
else if (info.indexOf('PHP') != -1) {
url += CurrentPath + 'action/php-mysql.php?imgID=' + imgIndexInDB;
}
else if (info.indexOf('JSP') != -1) {
url += CurrentPath + 'action/jsp-oracle.jsp?imgID=' + imgIndexInDB;
}
}
else {
url += CurrentPath + 'action/UploadedImages/' + encodeURI(fileName);
}
var newTR = document.createElement('tr');
_str = "<td class='tc'><a class='bluelink'" + ' href="' + url + '" target="_blank">' + fileName + "</a></td>"
+ "<td class='tc'>" + fileSize + '</td>';
if (info.indexOf("FieldsTrue:") != -1)
_str += "<td class='tc'><a class='bluelink'" + '" href="' + url.substring(0, url.length - 4) + '_1.txt' + '" target="_blank">Fields</td>';
else {
_str += "<td class='tc'>No Fields</td>";
}
newTR.innerHTML = _str;
document.getElementById('div-uploadedFile').appendChild(newTR);
}
}
function upload_preparation(_name) {
DWObject.IfShowCancelDialogWhenImageTransfer = !document.getElementById('quietScan').checked;
strActionPage = CurrentPath + 'action/';
switch (document.getElementById("ddlLanguages").options.selectedIndex) {
case 0: strActionPage += "php.php"; break;
case 2: strActionPage += "csharp.aspx"; break;
case 6: strActionPage += "jsp.jsp"; break;
case 4: strActionPage += "vbnet.aspx"; break;
case 8: strActionPage += "asp.asp"; break;
case 10: strActionPage += "cfm.cfm"; break;
case 1: strActionPage += "php-mysql.php?imgID=new"; break;
case 7: strActionPage += "jsp-oracle.jsp?imgID=new"; break;
case 3: strActionPage += "csharp-db.aspx?imgID=new"; break;
case 5: strActionPage += "vbnet-db.aspx?imgID=new"; break;
case 9: strActionPage += "asp-db.asp"; break;
case 11: preparetoUploadtoAzure(_name); break;
default: break;
}
DWObject.IfSSL = Dynamsoft.Lib.detect.ssl;
var _strPort = location.port == "" ? 80 : location.port;
if (Dynamsoft.Lib.detect.ssl == true)
_strPort = location.port == "" ? 443 : location.port;
DWObject.HTTPPort = _strPort;
if ([0, 2, 4, 6].indexOf(document.getElementById("ddlLanguages").selectedIndex) != -1) {
/* Add Fields to the Post */
var fields = document.getElementsByClassName('div-fields-item');
DWObject.ClearAllHTTPFormField();
for (var n = 0; n < fields.length; n++) {
var o = fields[n];
if (o.children[0].value != '')
DWObject.SetHTTPFormField(o.children[0].value, o.children[1].value);
}
}
}
function UploadImage_inner() {
if (DWObject.HowManyImagesInBuffer == 0)
return;
var Digital = new Date();
var uploadfilename = Digital.getMilliseconds(); // Uses milliseconds according to local time as the file name
upload_preparation(uploadfilename);
// Upload the image(s) to the server asynchronously
if (document.getElementById("ddlLanguages").options.selectedIndex == 11 /*Azure*/) return;
if (document.getElementsByName('ImageType')[0].checked) {
var uploadIndexes = [];
for (var i = DWObject.HowManyImagesInBuffer - 1; i > -1 ; i--) {
uploadIndexes.push(i);
}
var uploadJPGsOneByOne = function (errorCode, errorString, sHttpResponse) {
if (upload_returnSth)
_printUploadedFiles(sHttpResponse);
if (uploadIndexes.length > 0) {
var _index = uploadIndexes.pop();
if (upload_returnSth)
DWObject.HTTPUploadThroughPost(strHTTPServer, _index, strActionPage, uploadfilename + "-" + _index.toString() + ".jpg", OnHttpUploadSuccess, uploadJPGsOneByOne);
else
DWObject.HTTPUploadThroughPost(strHTTPServer, _index, strActionPage, uploadfilename + "-" + _index.toString() + ".jpg", uploadJPGsOneByOne, OnHttpServerReturnedSomething);
}
}
var _index = uploadIndexes.pop();
if (upload_returnSth)
DWObject.HTTPUploadThroughPost(strHTTPServer, _index, strActionPage, uploadfilename + "-" + _index.toString() + ".jpg", OnHttpUploadSuccess, uploadJPGsOneByOne);
else
DWObject.HTTPUploadThroughPost(strHTTPServer, _index, strActionPage, uploadfilename + "-" + _index.toString() + ".jpg", uploadJPGsOneByOne, OnHttpServerReturnedSomething);
}
else if (document.getElementsByName('ImageType')[1].checked) {
DWObject.HTTPUploadAllThroughPostAsMultiPageTIFF(strHTTPServer, strActionPage, uploadfilename + ".tif", OnHttpUploadSuccess, OnHttpServerReturnedSomething);
}
else if (document.getElementsByName('ImageType')[2].checked) {
DWObject.HTTPUploadAllThroughPostAsPDF(strHTTPServer, strActionPage, uploadfilename + ".pdf", OnHttpUploadSuccess, OnHttpServerReturnedSomething);
}
}
function UploadImage() {
if (DWObject) {
var nCount = 0, nCountUpLoaded = 0, aryFilePaths = [];
if (document.getElementById('uploadDirectly').checked) {
DWObject.IfShowCancelDialogWhenImageTransfer = false;
function ds_load_file_to_upload_directly(bSave, filesCount, index, path, filename) {
nCount = filesCount;
var filePath = path + "\\" + filename;
aryFilePaths.push(filePath);
if (aryFilePaths.length == nCount) {
upload_preparation();
var i = 0;
function uploadFileOneByOne() {
DWObject.HTTPUploadThroughPostDirectly(strHTTPServer, filePath, strActionPage, filename,
function () {
console.log('Upload Image:' + aryFilePaths[i] + ' -- successful');
i++;
if (i != nCount)
uploadFileOneByOne();
else
DWObject.UnregisterEvent('OnGetFilePath', ds_load_file_to_upload_directly);
},
OnHttpServerReturnedSomething
);
}
uploadFileOneByOne();
}
}
DWObject.RegisterEvent('OnGetFilePath', ds_load_file_to_upload_directly);
DWObject.ShowFileDialog(false, "Any File | *.*", 0, "", "", true, true, 0);
}
else {
UploadImage_inner();
}
}
}
/*******************/
/* Upload to Azure */
var Base64Binary = {
_keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
decode: function (input, arrayBuffer) {
//get last chars to see if are valid
var lkey1 = this._keyStr.indexOf(input.charAt(input.length - 1));
var lkey2 = this._keyStr.indexOf(input.charAt(input.length - 2));
var bytes = (input.length / 4) * 3;
if (lkey1 == 64) bytes--; //padding chars, so skip
if (lkey2 == 64) bytes--; //padding chars, so skip
var uarray;
var chr1, chr2, chr3;
var enc1, enc2, enc3, enc4;
var i = 0;
var j = 0;
if (arrayBuffer)
uarray = new Uint8Array(arrayBuffer);
else
uarray = new Uint8Array(bytes);
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
for (i = 0; i < bytes; i += 3) {
//get the 3 octects in 4 ascii chars
enc1 = this._keyStr.indexOf(input.charAt(j++));
enc2 = this._keyStr.indexOf(input.charAt(j++));
enc3 = this._keyStr.indexOf(input.charAt(j++));
enc4 = this._keyStr.indexOf(input.charAt(j++));
chr1 = (enc1 << 2) | (enc2 >> 4);
chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
chr3 = ((enc3 & 3) << 6) | enc4;
uarray[i] = chr1;
if (enc3 != 64) uarray[i + 1] = chr2;
if (enc4 != 64) uarray[i + 2] = chr3;
}
return uarray;
}
}
function uploadImageInner_azure(blobSasUrl, fileDataAsArrayBuffer) {
var ajaxRequest = new XMLHttpRequest();
try {
ajaxRequest.open('PUT', blobSasUrl, true);
ajaxRequest.setRequestHeader('x-ms-blob-type', 'BlockBlob');
ajaxRequest.send(fileDataAsArrayBuffer);
ajaxRequest.onreadystatechange = function () {
if (ajaxRequest.readyState == 4) {
console.log('Upload image to azure server successfully.');
}
}
}
catch (e) {
console.log("can't upload the image to server.\n" + e.toString());
}
}
function preparetoUploadtoAzure(__name) {
var uploadfilename = '';
//For JPEG, upload the current image
if (document.getElementsByName('ImageType')[0].checked) {
DWObject.SelectedImagesCount = 1;
DWObject.SetSelectedImageIndex(0, DWObject.CurrentImageIndexInBuffer);
DWObject.GetSelectedImagesSize(EnumDWT_ImageType.IT_JPG);
uploadfilename = __name + '.jpg';
}
else { //For TIFF, PDF, upload all images
var count = DWObject.HowManyImagesInBuffer;
DWObject.SelectedImagesCount = count;
for (var i = 0; i < count; i++) {
DWObject.SetSelectedImageIndex(i, i);
}
if (document.getElementsByName('ImageType')[1].checked) {
DWObject.GetSelectedImagesSize(EnumDWT_ImageType.IT_TIF);
uploadfilename = __name + '.tif';
}
else {
DWObject.GetSelectedImagesSize(EnumDWT_ImageType.IT_PDF);
uploadfilename = __name + '.pdf';
}
}
var strImg, aryImg, _uint8_STR, _bin_ARR, _blobImg;
strImg = DWObject.SaveSelectedImagesToBase64Binary();
// convert base64 to Uint8Array
var bytes = (strImg.length / 4) * 3;
var _temp = new ArrayBuffer(bytes);
_uint8_STR = Base64Binary.decode(strImg, _temp);
// convert Uint8Array to blob
_blobImg = new Blob([_uint8_STR]);
// upload to Azure server
var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function () {
if (xhr.readyState == 4) {
uploadImageInner_azure(xhr.responseText, _blobImg);
}
}
var actionPageFullPath = CurrentPath + 'action/' + 'azure.aspx?imageName=' + uploadfilename;
xhr.open('GET', actionPageFullPath, true);
xhr.send();
}
/*******************/