Function analyzeFile

webUi/scripts.js:149–226

()

    _("fileInput").click();
}
function analyzeFile() {
    const fileInput = _('fileInput');
    const outputDiv = _('analysisOutput');
    const uploadAppBtn = _('uploadApp');
    const uploadSpiffsBtn = _('uploadSpiffs');
    outputDiv.style.display = 'none';
    uploadAppBtn.style.display = 'none';
    uploadSpiffsBtn.style.display = 'none';
    let pass = true;
    if (fileInput.files.length === 0) {
        window.alert('Please, select a file.');
        return;
    }
    if (fileInput.files[0].name.split('.').pop() !== "bin") {
        window.alert('File is not a .bin');
        return;
    }
    const file = fileInput.files[0];
    const reader = new FileReader();
    reader.onload = function (e) {
        const data = new Uint8Array(reader.result);
        let start_point = 0;
        let spiffs_offset = 0;
        let spiffs_size = 0;
        let app_size = 0;
        let spiffs = false;
        const MAX_APP = 0x470000;
        const MAX_SPIFFS = 0x100000;
        const first_slice = data.slice(0x8000, 0x8000 + 16);
        const byte0 = first_slice[0];
        const byte1 = first_slice[1];
        const byte2 = first_slice[2];
        if (byte0 === 0xaa && byte1 === 0x50 && byte2 === 0x01 && pass === true) {
            pass = false;
            start_point = 0x10000;
            for (let i = 0; i < 0xA0; i += 0x20) {
                const pos = 0x8000 + i;
                if (pos + 16 > data.length) break;
                const slice = data.slice(pos, pos + 16);
                const byte3 = slice[3];
                const byte6 = slice[6];
                if ([0x00, 0x10, 0x20].includes(byte3) && byte6 === 0x01) {
                    app_size = (slice[10] << 16) | (slice[11] << 8) | 0x00;
                    if (data.length < (app_size + 0x10000)) app_size = data.length - 0x10000;
                    if (app_size > MAX_APP) app_size = MAX_APP;
                }
                if (byte3 === 0x82) {
                    spiffs_offset = (slice[6] << 16) | (slice[7] << 8) | slice[8];
                    spiffs_size = (slice[10] << 16) | (slice[11] << 8);
                    if (data.length < spiffs_offset) spiffs = false;
                    else if (spiffs_size > MAX_SPIFFS) {
                        spiffs_size = MAX_SPIFFS;
                        spiffs = true;
                    }
                    if (spiffs && data.length < (spiffs_offset + spiffs_size)) spiffs_size = data.length - spiffs_offset;
                }
            }
        }