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fix: passthrough for binary files #363

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fix: passthrough for binary files #363

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464f1b7
fix: passthrough for binary files
Techn1x Jan 29, 2024
5167433
chore: formatting
Techn1x Jan 29, 2024
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36 changes: 26 additions & 10 deletions src/create-passthrough.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -25,7 +25,10 @@ export function createPassthrough(fakeXHR, nativeXMLHttpRequest) {
fakeXHR.password
);

if (fakeXHR.responseType === 'arraybuffer') {
if (
fakeXHR.responseType === 'blob' ||
fakeXHR.responseType === 'arraybuffer'
) {
lifecycleProps = ['readyState', 'response', 'status', 'statusText'];
xhr.responseType = fakeXHR.responseType;
}
Expand All @@ -37,7 +40,7 @@ export function createPassthrough(fakeXHR, nativeXMLHttpRequest) {

// add progress event for async calls
// avoid using progress events for sync calls, they will hang https://bugs.webkit.org/show_bug.cgi?id=40996.
if (fakeXHR.async && fakeXHR.responseType !== 'arraybuffer') {
if (fakeXHR.async) {
evts.push('progress');
uploadEvents.push('progress');
}
Expand All @@ -55,26 +58,39 @@ export function createPassthrough(fakeXHR, nativeXMLHttpRequest) {
// fire fake event on `eventable`
function dispatchEvent(eventable, eventType, event) {
eventable.dispatchEvent(event);
if (eventable['on' + eventType]) {
eventable['on' + eventType](event);
}
}

// set the on- handler on the native xhr for the given eventType
function createHandler(eventType) {
xhr['on' + eventType] = function (event) {
const fakeEventKey = 'on' + eventType;

if (fakeXHR[fakeEventKey]) {
const fn = fakeXHR[fakeEventKey];
delete fakeXHR[fakeEventKey];
fakeXHR.addEventListener(eventType, fn);
}

xhr.addEventListener(eventType, function (event) {
copyLifecycleProperties(lifecycleProps, xhr, fakeXHR);
dispatchEvent(fakeXHR, eventType, event);
};
});
}

// set the on- handler on the native xhr's `upload` property for
// the given eventType
function createUploadHandler(eventType) {
if (xhr.upload && fakeXHR.upload && fakeXHR.upload['on' + eventType]) {
xhr.upload['on' + eventType] = function (event) {
if (xhr.upload && fakeXHR.upload) {
const fakeEventKey = 'on' + eventType;

if (fakeXHR.upload[fakeEventKey]) {
const fn = fakeXHR.upload[fakeEventKey];
delete fakeXHR.upload[fakeEventKey];
fakeXHR.upload.addEventListener(eventType, fn);
}

xhr.upload.addEventListener(eventType, function (event) {
dispatchEvent(fakeXHR.upload, eventType, event);
};
});
}
}

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