the connection to the server was unsuccessful(file ///android_asset/www/index.html)

本文介绍了解决在Android设备上运行Ionic应用时出现的服务器连接失败问题。通过调整config.xml文件中的loadUrlTimeoutValue值来延长加载等待时间,有效解决了加载超时的问题。

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问题描述:

使用ionic serve在浏览器上运行app没有问题,但是android真机运行报错

the connection to the server was unsuccessful(file ///android_asset/www/index.html)

解决方法:

config.xml添加

<preference name="loadUrlTimeoutValue" value="700000"/>

/home/langchao/PycharmProjects/pythonProject1/.venv/bin/python /home/langchao/Desktop/pyautogui文件夹/测试.py Traceback (most recent call last): File "/home/langchao/PycharmProjects/pythonProject1/.venv/lib/python3.7/site-packages/selenium/webdriver/common/selenium_manager.py", line 123, in run completed_proc = subprocess.run(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE) File "/usr/lib/python3.7/subprocess.py", line 472, in run with Popen(*popenargs, **kwargs) as process: File "/usr/lib/python3.7/subprocess.py", line 775, in __init__ restore_signals, start_new_session) File "/usr/lib/python3.7/subprocess.py", line 1522, in _execute_child raise child_exception_type(errno_num, err_msg, err_filename) OSError: [Errno 8] Exec format error: '/home/langchao/PycharmProjects/pythonProject1/.venv/lib/python3.7/site-packages/selenium/webdriver/common/linux/selenium-manager' The above exception was the direct cause of the following exception: Traceback (most recent call last): File "/home/langchao/PycharmProjects/pythonProject1/.venv/lib/python3.7/site-packages/selenium/webdriver/common/driver_finder.py", line 38, in get_path path = SeleniumManager().driver_location(options) if path is None else path File "/home/langchao/PycharmProjects/pythonProject1/.venv/lib/python3.7/site-packages/selenium/webdriver/common/selenium_manager.py", line 90, in driver_location output = self.run(args) File "/home/langchao/PycharmProjects/pythonProject1/.venv/lib/python3.7/site-packages/selenium/webdriver/common/selenium_manager.py", line 129, in run raise WebDriverException(f"Unsuccessful command executed: {command}") from err selenium.common.exceptions.WebDriverException: Message: Unsuccessful command executed: /home/langchao/PycharmProjects/pythonProject1/.venv/lib/python3.7/site-packages/selenium/webdriver/common/linux/selenium-manager --browser firefox --browser-path /usr/bin/firefox --output json The above exception was the direct cause of the following exception: Traceback (most recent call last): File "/home/langchao/Desktop/pyautogui文件夹/测试.py", line 6, in <module> driver = webdriver.Firefox(options=options) File "/home/langchao/PycharmProjects/pythonProject1/.venv/lib/python3.7/site-packages/selenium/webdriver/firefox/webdriver.py", line 59, in __init__ self.service.path = DriverFinder.get_path(self.service, options) File "/home/langchao/PycharmProjects/pythonProject1/.venv/lib/python3.7/site-packages/selenium/webdriver/common/driver_finder.py", line 41, in get_path raise NoSuchDriverException(msg) from err selenium.common.exceptions.NoSuchDriverException: Message: Unable to obtain driver for firefox using Selenium Manager.; For documentation on this error, please visit: https://www.selenium.dev/documentation/webdriver/troubleshooting/errors/driver_location 进程已结束,退出代码为 1
最新发布
06-19
<think>我们正在处理用户在Linux系统上使用SeleniumFirefoxWebDriver时遇到的'Execformaterror'和'NoSuchDriverException'错误。用户的环境是:-操作系统:Linux4.19.0-arm64-desktop(ARM64架构)-浏览器:Firefox138.0-Python版本:3.7根据之前的对话,我们已经知道:1.用户使用的是ARM64架构的Linux系统。2.用户下载的GeckoDriver版本是v0.34.0(适用于ARM64)。但是,用户遇到了两个错误:-'Execformaterror':这通常意味着尝试运行的二进制文件与系统架构不兼容。例如,在ARM64系统上运行x86_64的二进制文件。-'NoSuchDriverException':这可能是由于WebDriver无法启动或找到对应的驱动程序。###解决方案步骤####1.确认GeckoDriver的架构由于用户系统是ARM64,必须使用ARM64版本的GeckoDriver。我们可以通过以下命令检查已下载的GeckoDriver的架构:```bashfile/usr/local/bin/geckodriver```期望的输出应包含`aarch64`或`ARMaarch64`,例如:```geckodriver:ELF64-bitLSBexecutable,ARMaarch64,version1(SYSV),staticallylinked,stripped```如果输出显示`x86_64`或`Intel80386`,则说明下载了错误的架构版本。####2.重新下载并安装ARM64版本的GeckoDriver如果确认架构错误,请重新下载ARM64版本:```bash#移除现有的错误版本(如果存在)sudorm/usr/local/bin/geckodriver#下载ARM64版本wgethttps://github.com/mozilla/geckodriver/releases/download/v0.34.0/geckodriver-v0.34.0-linux-aarch64.tar.gz#解压并安装tar-xvzfgeckodriver-v0.34.0-linux-aarch64.tar.gzchmod+xgeckodriversudomvgeckodriver/usr/local/bin/```####3.验证GeckoDriver可执行性运行以下命令,确保没有错误:```bashgeckodriver--version```预期输出:```geckodriver0.34.0(e1b6a4f0c52024-03-11)```####4.检查Firefox的架构同样,确保Firefox也是ARM64版本。运行:```bashfile$(whichfirefox)```输出应包含`aarch64`或`ARM`。如果不是,则需要安装ARM64版本的Firefox。####5.在Selenium代码中指定Firefox二进制路径有时,系统默认的Firefox可能不是ARM版本,或者路径不正确。在代码中明确指定:```pythonfromseleniumimportwebdriveroptions=webdriver.FirefoxOptions()options.binary_location="/usr/bin/firefox"#或者通过`whichfirefox`获取的实际路径driver=webdriver.Firefox(options=options)driver.get("http://www.google.com")print(driver.title)driver.quit()```####6.确保Python环境正确确认使用的Python解释器也是ARM64架构。运行:```bashpython3.7-c"importplatform;print(platform.machine())"```输出应为`aarch64`。####7.解决依赖问题如果系统缺少必要的依赖库,也可能导致问题。安装常见依赖:```bashsudoaptupdatesudoaptinstalllibgtk-3-0libdbus-glib-1-2libxt6```####8.使用SeleniumManager(Selenium4.6+)如果使用Selenium4.6及以上版本,可以尝试让Selenium自动管理驱动:```pythonfromseleniumimportwebdriverfromselenium.webdriver.firefox.serviceimportService#使用SeleniumManager自动获取驱动driver=webdriver.Firefox()driver.get("https://www.mozilla.org")print(driver.title)driver.quit()```###常见问题排查-**错误:`OSError:[Errno8]Execformaterror`**:几乎可以确定是驱动程序的架构错误。-**错误:`NoSuchDriverException`**:可能是驱动程序路径未正确设置,或者驱动程序无法启动(可能由于架构问题或权限问题)。-确保`geckodriver`在系统PATH中,或者通过`service`参数指定路径:```pythonservice=Service('/usr/local/bin/geckodriver')driver=webdriver.Firefox(service=service,options=options)```###总结用户的问题很可能是由于在ARM64系统上使用了x86_64架构的GeckoDriver。按照上述步骤重新安装ARM64版本的驱动,并确保Firefox也是ARM64版本,问题应得到解决。---§§相关问题§§1.如何检查Linux二进制文件的架构信息?2.Selenium4的WebDriver自动管理功能是如何工作的?3.在ARM架构上运行Selenium还有哪些常见问题?</think>### 解决 Linux 上 Selenium Firefox WebDriver 的 "Exec format error" 和 "NoSuchDriverException" 问题 以下是针对 ARM64 Linux 系统的完整解决方案(基于您的系统信息:Linux 4.19.0-arm64-desktop,Firefox 138.0): --- #### 1. **核心问题诊断** - **`Exec format error`**:通常由**架构不匹配**引起(如在 ARM64 系统运行 x86_64 驱动) - **`NoSuchDriverException`**:WebDriver 未找到或无法执行 - 根本原因:ARM64 系统需要专用的 **aarch64 架构驱动**,常规 x86_64 驱动不兼容[^1] --- #### 2. **解决方案步骤** ##### ① 下载 ARM64 专用驱动 ```bash # 下载适用于 aarch64 的 GeckoDriver wget https://github.com/mozilla/geckodriver/releases/download/v0.34.0/geckodriver-v0.34.0-linux-aarch64.tar.gz # 解压并安装到系统路径 tar -xvzf geckodriver-*.tar.gz chmod +x geckodriver sudo mv geckodriver /usr/local/bin/ ``` ##### ② 验证驱动兼容性 ```bash # 检查驱动架构 file /usr/local/bin/geckodriver # 期望输出: # ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV), statically linked... ``` ##### ③ Python 环境配置 ```python from selenium import webdriver from selenium.webdriver.firefox.service import Service # 显式指定 ARM 驱动路径 service = Service('/usr/local/bin/geckodriver') options = webdriver.FirefoxOptions() options.binary_location = '/usr/bin/firefox' # ARM 版 Firefox 路径 driver = webdriver.Firefox(service=service, options=options) ``` ##### ④ 依赖库安装 ```bash # 安装必要依赖 sudo apt update sudo apt install -y libgtk-3-0 libdbus-glib-1-2 libxt6 ``` --- #### 3. **常见错误排查** | 错误类型 | 解决方案 | |---------|---------| | **`Exec format error`** | 确认驱动架构:`file /usr/local/bin/geckodriver` 输出必须含 **`aarch64`** | | **`NoSuchDriverException`** | 检查驱动路径权限:`sudo chmod 755 /usr/local/bin/geckodriver` | | **浏览器启动失败** | 指定 Firefox 路径:`options.binary_location = '/usr/bin/firefox'` | | **内存不足** | 添加参数:`options.add_argument("--disable-dev-shm-usage")` | --- #### 4. **完整示例代码** ```python from selenium import webdriver from selenium.webdriver.firefox.service import Service from selenium.webdriver.firefox.options import Options # 配置 ARM 专用路径 service = Service('/usr/local/bin/geckodriver') options = Options() options.binary_location = '/usr/bin/firefox' # ARM 版 Firefox options.add_argument("--disable-dev-shm-usage") # 解决内存问题 try: driver = webdriver.Firefox(service=service, options=options) driver.get("https://github.com") print("页面标题:", driver.title) finally: driver.quit() ``` --- #### 5. **关键注意事项** 1. **架构一致性**:驱动、浏览器、Python 解释器必须同为 **ARM64** 架构 ```bash # 验证命令 file $(which firefox) # 应显示 aarch64 file $(which python3.7) # 应显示 aarch64 ``` 2. **版本匹配**:GeckoDriver v0.34.0 是 Firefox 138.0 的**最低兼容版本**[^2] 3. **权限问题**:确保 `/usr/local/bin` 在 `$PATH` 中: ```bash echo $PATH | grep /usr/local/bin ``` ---
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