105 lines
No EOL
2.9 KiB
TypeScript
105 lines
No EOL
2.9 KiB
TypeScript
class Chunk {
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Index: number;
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Start: number;
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End: number;
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constructor(start: number, end: number, index: number) {
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this.Start = start;
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this.End = end;
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this.Index = index;
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}
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}
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class Uploader {
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ParentForm: HTMLFormElement;
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FileInput: HTMLInputElement;
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File: File;
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InitRoute: string = "/Upload/Init";
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ChunkRoute: string = "/Upload/Chunk";
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MaxChunkSize: number = 1024 * 1024 * 25;
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TotalChunks: number;
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CurrentChunk: number;
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Chunks: Chunk[];
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Key: string;
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Init(elementId: string) {
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this.FileInput = document.getElementById(elementId) as HTMLInputElement;
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this.ParentForm = this.FileInput.closest("form");
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this.Chunks = [];
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this.ParentForm.onsubmit = async (e) => {
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await this.HandleFormSubmit(e);
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};
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}
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async HandleFormSubmit(e: SubmitEvent) {
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e.preventDefault();
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this.File = this.FileInput.files.item(0);
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this.TotalChunks = Math.ceil(this.File.size / this.MaxChunkSize);
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var response = await fetch(this.InitRoute, {
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method: "POST"
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});
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const data = await response.json();
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if (response.ok) {
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this.Key = data.key;
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this.GetChunks();
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for (let chunk of this.Chunks) {
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let dataChunk = await this.ReadChunkFromFile(this.File, chunk);
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let formData = new FormData();
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formData.append('file', this.File.slice(chunk.Start, chunk.End));
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formData.append('start', chunk.Start.toString());
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formData.append('end', chunk.End.toString());
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formData.append('key', this.Key);
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formData.append('total', this.File.size.toString());
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console.info(`Uploading chunk ${chunk.Index}/${this.TotalChunks}...`);
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let response = await fetch(this.ChunkRoute, {
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method: "POST",
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body: formData
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});
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debugger;
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}
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}
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}
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ReadChunkFromFile(file: File, chunk: Chunk): Promise<string | ArrayBuffer> {
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return new Promise((resolve, reject) => {
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let reader = new FileReader();
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let blob = this.File.slice(chunk.Start, chunk.End);
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reader.onload = () => {
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resolve(reader.result);
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}
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reader.onerror = reject;
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reader.readAsArrayBuffer(blob);
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});
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}
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GetChunks() {
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for (let currentChunk = 1; currentChunk <= this.TotalChunks; currentChunk++) {
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let start = (currentChunk - 1) * this.MaxChunkSize;
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let end = (currentChunk * this.MaxChunkSize) - 1;
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if (currentChunk == this.TotalChunks)
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end = this.File.size;
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this.Chunks.push(new Chunk(start, end, currentChunk));
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}
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}
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} |