不正确的响应 MIME 类型(预期的"应用程序/wasm")PSPDFKIT 和保留大小不足以包含签名问题 oracle apex？

Question

我遵循了PSPDFKit独立集成步骤，以及公共目录中的所有文件(Apache tomcat中的文件夹"i"(，

我收到"PSPDFKit for Web已成功加载！"消息，但它挂断了，控制台给了我一个错误：-

Failed to execute 'compile' on 'WebAssembly': Incorrect response MIME type. Expected 'application/wasm'.

另外，当我尝试添加数字签名时也遇到了这个问题

Cannot add the container structure because the reserved size is not enough to contain the signature. Available size 8193, actual size 89694

我通过以下代码尝试过

PSPDFKit.load({
container: "#pspdfkit",
document: 'f?p=&APP_ID.:0:&APP_SESSION.:APPLICATION_PROCESS=PREVIEW_FILE:::FILE_ID:'  + apex.item('P6_ID').getValue(),
licenseKey: "",
initialViewState: new PSPDFKit.ViewState({
showSignatureValidationStatus:
PSPDFKit.ShowSignatureValidationStatusMode.IF_SIGNED
}),
async trustedCAsCallback() {

const response = await fetch("http://localhost:90/i/certs/ca.pem");
const cert = await response.text();
return [cert];
}
})   
.then(function(instance) {

var item = {
type: "custom",
id: "my-button",
title: "digital sign",
onPress: function(event) {
instance
.signDocument(null, generatePKCS7)
.then(() => {
console.log("document signed.");
})

.catch(error => {
console.error("The document could not be signed.", error);
});
}
};
if (app_user =="aaaa") {
instance.setToolbarItems(function(items) {
items.push(item);
return items;
});
}
function generatePKCS7({ fileContents }) {
const certificatePromise = fetch("http://localhost:90/i/certs/certificate.pem").then(response =>
response.text()
);
const privateKeyPromise = fetch("http://localhost:90/i/certs/private-key.pem").then(response =>
response.text()
);
return new Promise((resolve, reject) => {
Promise.all([certificatePromise, privateKeyPromise])
.then(([certificatePem, privateKeyPem]) => {
const certificate = forge.pki.certificateFromPem(certificatePem);
const privateKey = forge.pki.privateKeyFromPem(privateKeyPem);
const p7 = forge.pkcs7.createSignedData();
p7.content = new forge.util.ByteBuffer(fileContents);    
p7.addCertificate(certificate);
p7.addSigner({
key: privateKey,
certificate: certificate,
digestAlgorithm: forge.pki.oids.sha256,
authenticatedAttributes: [
{
type: forge.pki.oids.contentType,
value: forge.pki.oids.data
},
{
type: forge.pki.oids.messageDigest
},
{
type: forge.pki.oids.signingTime,
Value: new Date()
}
]
}
);
p7.sign({ detached: true })

const result = stringToArrayBuffer(
forge.asn1.toDer(p7.toAsn1()).getBytes()
);
resolve(result);

})
.catch(reject);
});
}
function stringToArrayBuffer(binaryString) {
const buffer = new ArrayBuffer(binaryString.length);
let bufferView = new Uint8Array(buffer);
for (let i = 0, len = binaryString.length; i < len; i++) {
bufferView[i] = binaryString.charCodeAt(i);
}
return buffer;
}
})
.catch(function(error) {
console.error(error.message);
})

apex version 19.2 
tomcat 8.5 ,
ords

Answer 1

看起来 WASM 文件没有提供正确的内容类型。解决方案是修复服务器以返回正确的内容类型，或者在加载 PSPDFKit 时禁用 WebAssembly 的流式实例化，如下所述：https://pspdfkit.com/guides/web/current/troubleshooting/common-issues/#response-has-unsupported-mime-type-error

将来，请与 https://pspdfkit.com/support/request 联系，我们的支持团队将为您提供帮助。