您不需要session标记，只需将 Postman 请求中的param name更改为appReceivNum即可：https://egov.uscis.gov/casestatus/mycasestatus.do?appReceiptNum=LINXXXXXXXXXX

@阿洛克
您需要的是术语“headless browser / scraper”，只是创建了一个快速示例（但在node.js中）

const today = formatYmd(new Date()) 
    const browser = await puppeteer.launch()
    const page = await browser.newPage()
    console.log("going to URL")
    await page.goto(url)
    await page.$eval('#receipt_number', (el,receipt) => el.value = `${receipt}`, process.env.RECEIPT_NUMBER)
    await page.click('input[type="submit"]')
    console.log("waiting for submission to be completed.")
    await page.waitForSelector('div.current-status-sec').catch(t => console.log("Not able to load status screen"))
    const status = removeTags(await page.$eval('.current-status-sec', el => el.innerText))
    console.log(`${today}: ${status}`)
    await page.screenshot({path: `./screenshot/${today}_screenshot.png`})
    browser.close()

您可以在此处找到完整的存储库。https://github.com/Parthashah/uscis-status-check
代码将提供返回屏幕截图和状态x1c 0d1x

我刚刚创建了一个简单的移民局网页爬虫刮刀Spring Boot 应用程序使用HtmlUnit .唯一的事情是我的爬虫忽略了错误的案例编号.但正在工作. github链接在这里：https://github.com/somych1/USCISCaseStatusWebScraper

public ResponseDTO getStatus(String caseId){
    ResponseDTO responseDTO = new ResponseDTO();

    //browser setup
    WebClient webClient = new WebClient(BrowserVersion.CHROME);
    webClient.getOptions().setUseInsecureSSL(true);
    webClient.getOptions().setRedirectEnabled(true);
    webClient.getOptions().setJavaScriptEnabled(false);
    webClient.getOptions().setCssEnabled(false);
    webClient.getOptions().setThrowExceptionOnScriptError(false);
    webClient.getOptions().setThrowExceptionOnFailingStatusCode(false);
    webClient.getCookieManager().setCookiesEnabled(false);
    webClient.getOptions().setTimeout(8000);
    webClient.getOptions().setDownloadImages(false);
    webClient.getOptions().setGeolocationEnabled(false);
    webClient.getOptions().setAppletEnabled(false);

    try{
        // loading the HTML to a Document Object
        HtmlPage page = webClient.getPage(url);

        // case lookup
        HtmlInput input = page.getHtmlElementById("receipt_number");
        input.setValueAttribute(caseId);
        HtmlInput button = page.getElementByName("initCaseSearch");
        HtmlPage pageAfterClick = button.click();

        // new page after click
        HtmlHeading1 h1 = pageAfterClick.getFirstByXPath("//div/h1");
        HtmlParagraph paragraph = pageAfterClick.getFirstByXPath("//div/p");

        //setting response object
        responseDTO.setCaseId(caseId);
        responseDTO.setStatus(status);
        responseDTO.setDescription(description);
    } catch (IOException ex) {
        ex.printStackTrace();
    }
    return responseDTO;
}