Class XhrResponse

utils/upload.ts:185–219

}

class XhrResponse {
    ok: boolean;
    headers: Headers;
    status: number;
    statusText: string;
    url: string;

    constructor(private xhr: XMLHttpRequest) {
        this.status = xhr.status;
        this.statusText = xhr.statusText;
        this.url = xhr.responseURL;
        this.ok = this.status >= 200 && this.status < 300;
        this.headers = new Headers();

        const rawHeaders = xhr.getAllResponseHeaders();
        for (const line of rawHeaders.trim().split(/[\r\n]+/)) {
            if (!line) continue;

            const separatorIndex = line.indexOf(":");
            if (separatorIndex < 0) continue;

            this.headers.append(line.slice(0, separatorIndex).trim(), line.slice(separatorIndex + 1).trim());
        }
    }

    async text(): Promise<string> {
        return typeof this.xhr.response === "string"
            ? this.xhr.response
            : this.xhr.responseText;
    }

    async json(): Promise<unknown> {
        return JSON.parse(await this.text());
    }
}

function setXhrUploadProgress(event: ProgressEvent) {
    if (!event.lengthComputable || event.total <= 0) {