在本地主机上使用 nanohttpd 作为服务器，如何在整个目录中提供静态 HTML 代码？
Using nanohttpd for server on localhost, how to serve the static HTML code in the whole directory?
我无法让 nanohttpd 工作。似乎无法在应用程序的根目录中找到 www 目录。
我的代码在https://github.com/tlkahn/neonx
我在 MainActivity.java 的代码：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
BottomNavigationView navView = findViewById(R.id.nav_view);
mWebView = findViewById(R.id.webkit);
navView.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
WebSettings webSettings = mWebView.getSettings();
webSettings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
webSettings.setDomStorageEnabled(true);
mWebView.getSettings().setLoadsImagesAutomatically(true);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
mWebView.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
return false;
}
});
if (!haveNetworkConnection()) {
new AlertDialog.Builder(this)
.setTitle("You are not connected to internet.")
.setMessage("Are you sure you want to exit?")
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
finishAffinity();
System.exit(0);
}
}).setNegativeButton("No", null).show();
}
startLocalServer(3000, "www", true, true );
}
public void startLocalServer(int port, String root, Boolean localhost, Boolean keepAlive) {
try {
File www_root = new File(root);
server = new WebServer("localhost", port, www_root.getAbsoluteFile());
server.start();
printIp();
} catch (IOException e) {
e.printStackTrace();
}
}
当我尝试访问 localhost:3000 时，出现错误：给定路径不是目录。错误似乎来自这一行：https://git.io/fjS3f
我猜我初始化rootDir的方式是错误的（这一行：https://git.io/fjS3v）。但是我怎样才能使这项工作呢？我的意思是服务整个目录，这意味着所有 CSS/JS/hypyerlinks 应该工作，一旦 nanohttpd 开始服务...
问题是您无法像访问本地文件一样访问 assets 文件夹中的文件。您必须扩展 NanoHTTPD 并覆盖 serve(IHTTPSession) 才能提供资产。这是 Kotlin 中的示例。如果您看不懂，请告诉我，我会将其移植到 Java。
class FileServer(private val context: Context, port: Int) : NanoHTTPD(port) {
override fun serve(session: IHTTPSession): Response {
val uri = session.uri.removePrefix("/").ifEmpty { "index.html" }
println("Loading $uri")
try {
val mime = when (uri.substringAfterLast(".")) {
"ico" -> "image/x-icon"
"css" -> "text/css"
"htm" -> "text/html"
"html" -> "text/html"
else -> "application/javascript"
}
return NanoHTTPD.newChunkedResponse(
Response.Status.OK,
mime,
context.assets.open("www/$uri") // prefix with www because your files are not in the root folder in assets
)
} catch (e: Exception) {
val message = "Failed to load asset $uri because $e"
println(message)
e.printStackTrace()
return NanoHTTPD.newFixedLengthResponse(message)
}
}
输出：
LogCat:
2019-08-05 15:21:53.838 10650-10650/com.neonxorg.neonx E/MainActivity: -------Assets List-----
2019-08-05 15:21:53.838 10650-10650/com.neonxorg.neonx E/MainActivity: asset-manifest.json
2019-08-05 15:21:53.838 10650-10650/com.neonxorg.neonx E/MainActivity: favicon.ico
2019-08-05 15:21:53.838 10650-10650/com.neonxorg.neonx E/MainActivity: index.html
2019-08-05 15:21:53.838 10650-10650/com.neonxorg.neonx E/MainActivity: manifest.json
2019-08-05 15:21:53.838 10650-10650/com.neonxorg.neonx E/MainActivity: precache-manifest.81af63d07b6dd6ae8e331187c522b020.js
2019-08-05 15:21:53.838 10650-10650/com.neonxorg.neonx E/MainActivity: service-worker.js
2019-08-05 15:21:53.838 10650-10650/com.neonxorg.neonx E/MainActivity: static
2019-08-05 15:21:53.842 10650-10650/com.neonxorg.neonx E/MainActivity: copyFolderFromAssets rootDirFullPath-www targetDirFullPath-/storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www
2019-08-05 15:21:53.865 10650-10650/com.neonxorg.neonx E/MainActivity: copyFolderFromAssets rootDirFullPath-www/static targetDirFullPath-/storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/static
2019-08-05 15:21:53.867 10650-10650/com.neonxorg.neonx E/MainActivity: copyFolderFromAssets rootDirFullPath-www/static/css targetDirFullPath-/storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/static/css
2019-08-05 15:21:53.922 10650-10650/com.neonxorg.neonx E/MainActivity: copyFolderFromAssets rootDirFullPath-www/static/js targetDirFullPath-/storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/static/js
2019-08-05 15:21:54.352 10650-10650/com.neonxorg.neonx E/MainActivity: copyFolderFromAssets rootDirFullPath-www/static/media targetDirFullPath-/storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/static/media
2019-08-05 15:21:54.526 10650-10650/com.neonxorg.neonx E/MainActivity: -------Root File List-----
2019-08-05 15:21:54.528 10650-10650/com.neonxorg.neonx E/File: /storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/precache-manifest.81af63d07b6dd6ae8e331187c522b020.js
2019-08-05 15:21:54.528 10650-10650/com.neonxorg.neonx E/File: /storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/service-worker.js
2019-08-05 15:21:54.528 10650-10650/com.neonxorg.neonx E/File: /storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/static
2019-08-05 15:21:54.528 10650-10650/com.neonxorg.neonx E/File: /storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/favicon.ico
2019-08-05 15:21:54.528 10650-10650/com.neonxorg.neonx E/File: /storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/manifest.json
2019-08-05 15:21:54.528 10650-10650/com.neonxorg.neonx E/File: /storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/asset-manifest.json
2019-08-05 15:21:54.528 10650-10650/com.neonxorg.neonx E/File: /storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/index.html
2019-08-05 15:21:54.704 10650-10650/com.neonxorg.neonx E/MainActivity: Connected : Please access! http://192.168.1.2:3000 From a web browser
代码：
public final String TAG = getClass().getSimpleName();
public void startLocalServer(int port, String root, Boolean localhost, Boolean keepAlive) {
try {
String[] filePathList = (getAssets().list("www"));
Log.e(TAG,"-------Assets List-----");
for (String s : filePathList) {
Log.e(TAG, s);
}
File externalCache = getExternalCacheDir();
if (externalCache != null) {
String path = externalCache.getAbsolutePath() + "/" + root;
copyFolderFromAssets(getApplicationContext(), "www", path);
File www_root = new File(path);
Log.e(TAG,"-------Root File List-----");
for (File f : www_root.listFiles()) {
Log.e("File ", f.getAbsolutePath());
}
server = new WebServer("localhost", port, www_root.getCanonicalFile());
server.start();
printIp();
}
} catch (IOException e) {
Log.e(TAG, Log.getStackTraceString(e));
}
}
public void copyFolderFromAssets(Context context, String rootDirFullPath, String targetDirFullPath) {
Log.e(TAG,"copyFolderFromAssets " + "rootDirFullPath-" + rootDirFullPath + " targetDirFullPath-" + targetDirFullPath);
File file = new File(targetDirFullPath);
if (!file.exists()) {
new File(targetDirFullPath).mkdirs();
}
try {
String[] listFiles = context.getAssets().list(rootDirFullPath);// 遍历该目录下的文件和文件夹
for (String string : listFiles) {// 看起子目录是文件还是文件夹，这里只好用.做区分了
if (isFileByName(string)) {// 文件
copyFileFromAssets(context, rootDirFullPath + "/" + string, targetDirFullPath + "/" + string);
} else {// 文件夹
String childRootDirFullPath = rootDirFullPath + "/" + string;
String childTargetDirFullPath = targetDirFullPath + "/" + string;
new File(childTargetDirFullPath).mkdirs();
copyFolderFromAssets(context, childRootDirFullPath, childTargetDirFullPath);
}
}
} catch (IOException e) {
Log.e(TAG, Log.getStackTraceString(e));
}
}
public void copyFileFromAssets(Context context, String assetsFilePath, String targetFileFullPath) {
InputStream assestsFileInputStream;
try {
assestsFileInputStream = context.getAssets().open(assetsFilePath);
FileOutputStream fOS = new FileOutputStream(new File(targetFileFullPath));
int length = -1;
byte[] buf = new byte[1024];
while ((length = assestsFileInputStream.read(buf)) != -1) {
fOS.write(buf, 0, length);
}
fOS.flush();
} catch (IOException e) {
Log.e(TAG, Log.getStackTraceString(e));
}
}
private boolean isFileByName(String str) {
return str.contains(".");
}
private void printIp() {
WifiManager wifiManager = (WifiManager) getApplicationContext().getSystemService(WIFI_SERVICE);
int ipAddress = wifiManager.getConnectionInfo().getIpAddress();
final String formatedIpAddress = String.format("%d.%d.%d.%d", (ipAddress & 0xff), (ipAddress >> 8 & 0xff),
(ipAddress >> 16 & 0xff), (ipAddress >> 24 & 0xff));
Log.e(TAG,"Connected : " + "Please access! http://" + formatedIpAddress + ":" + server.getListeningPort() + " From a web browser");
}
given path is not a directory.
当 nanphttpd 无法定位数据时，它会给出此错误。
Why You are not getting the actual error
在 copyFolderFromAssets 和 copyFileFromAssets 的 catch 块中，您正在使用 e.printStackTrace()，由于 Show only，它可能不会显示在您的 LogCat 上所选应用程序 过滤器
为了打印错误，您需要使用以下内容：
Log.e(TAG, Log.getStackTraceString(e));
我用 Log.e 语句替换了你所有的 System.out 和 e.printStackTrace。应用程序很可能无法将内容从 www 目录复制到目标目录。我将目标目录更改为缓存目录，它在我的设备上运行。 （见下文）：
File externalCache = getExternalCacheDir();
if (externalCache != null) {
String path = externalCache.getAbsolutePath() + "/" + root;
File www_root = new File(path);
copyFolderFromAssets(getApplicationContext(), "www", path);
Log.e(TAG,"-------Root File List-----");
for (File f : www_root.listFiles()) {
Log.e("File ", f.getAbsolutePath());
}
server = new WebServer("localhost", port, www_root.getCanonicalFile());
server.start();
printIp();
}
旁注：
- 不需要在这些函数中使用
static 关键字，直到或除非您想将它们复制到实用程序中 class
我无法让 nanohttpd 工作。似乎无法在应用程序的根目录中找到 www 目录。
我的代码在https://github.com/tlkahn/neonx
我在 MainActivity.java 的代码：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
BottomNavigationView navView = findViewById(R.id.nav_view);
mWebView = findViewById(R.id.webkit);
navView.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
WebSettings webSettings = mWebView.getSettings();
webSettings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
webSettings.setDomStorageEnabled(true);
mWebView.getSettings().setLoadsImagesAutomatically(true);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
mWebView.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
return false;
}
});
if (!haveNetworkConnection()) {
new AlertDialog.Builder(this)
.setTitle("You are not connected to internet.")
.setMessage("Are you sure you want to exit?")
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
finishAffinity();
System.exit(0);
}
}).setNegativeButton("No", null).show();
}
startLocalServer(3000, "www", true, true );
}
public void startLocalServer(int port, String root, Boolean localhost, Boolean keepAlive) {
try {
File www_root = new File(root);
server = new WebServer("localhost", port, www_root.getAbsoluteFile());
server.start();
printIp();
} catch (IOException e) {
e.printStackTrace();
}
}
当我尝试访问 localhost:3000 时，出现错误：给定路径不是目录。错误似乎来自这一行：https://git.io/fjS3f
我猜我初始化rootDir的方式是错误的（这一行：https://git.io/fjS3v）。但是我怎样才能使这项工作呢？我的意思是服务整个目录，这意味着所有 CSS/JS/hypyerlinks 应该工作，一旦 nanohttpd 开始服务...
问题是您无法像访问本地文件一样访问 assets 文件夹中的文件。您必须扩展 NanoHTTPD 并覆盖 serve(IHTTPSession) 才能提供资产。这是 Kotlin 中的示例。如果您看不懂，请告诉我，我会将其移植到 Java。
class FileServer(private val context: Context, port: Int) : NanoHTTPD(port) {
override fun serve(session: IHTTPSession): Response {
val uri = session.uri.removePrefix("/").ifEmpty { "index.html" }
println("Loading $uri")
try {
val mime = when (uri.substringAfterLast(".")) {
"ico" -> "image/x-icon"
"css" -> "text/css"
"htm" -> "text/html"
"html" -> "text/html"
else -> "application/javascript"
}
return NanoHTTPD.newChunkedResponse(
Response.Status.OK,
mime,
context.assets.open("www/$uri") // prefix with www because your files are not in the root folder in assets
)
} catch (e: Exception) {
val message = "Failed to load asset $uri because $e"
println(message)
e.printStackTrace()
return NanoHTTPD.newFixedLengthResponse(message)
}
}
输出：
LogCat:
2019-08-05 15:21:53.838 10650-10650/com.neonxorg.neonx E/MainActivity: -------Assets List-----
2019-08-05 15:21:53.838 10650-10650/com.neonxorg.neonx E/MainActivity: asset-manifest.json
2019-08-05 15:21:53.838 10650-10650/com.neonxorg.neonx E/MainActivity: favicon.ico
2019-08-05 15:21:53.838 10650-10650/com.neonxorg.neonx E/MainActivity: index.html
2019-08-05 15:21:53.838 10650-10650/com.neonxorg.neonx E/MainActivity: manifest.json
2019-08-05 15:21:53.838 10650-10650/com.neonxorg.neonx E/MainActivity: precache-manifest.81af63d07b6dd6ae8e331187c522b020.js
2019-08-05 15:21:53.838 10650-10650/com.neonxorg.neonx E/MainActivity: service-worker.js
2019-08-05 15:21:53.838 10650-10650/com.neonxorg.neonx E/MainActivity: static
2019-08-05 15:21:53.842 10650-10650/com.neonxorg.neonx E/MainActivity: copyFolderFromAssets rootDirFullPath-www targetDirFullPath-/storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www
2019-08-05 15:21:53.865 10650-10650/com.neonxorg.neonx E/MainActivity: copyFolderFromAssets rootDirFullPath-www/static targetDirFullPath-/storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/static
2019-08-05 15:21:53.867 10650-10650/com.neonxorg.neonx E/MainActivity: copyFolderFromAssets rootDirFullPath-www/static/css targetDirFullPath-/storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/static/css
2019-08-05 15:21:53.922 10650-10650/com.neonxorg.neonx E/MainActivity: copyFolderFromAssets rootDirFullPath-www/static/js targetDirFullPath-/storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/static/js
2019-08-05 15:21:54.352 10650-10650/com.neonxorg.neonx E/MainActivity: copyFolderFromAssets rootDirFullPath-www/static/media targetDirFullPath-/storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/static/media
2019-08-05 15:21:54.526 10650-10650/com.neonxorg.neonx E/MainActivity: -------Root File List-----
2019-08-05 15:21:54.528 10650-10650/com.neonxorg.neonx E/File: /storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/precache-manifest.81af63d07b6dd6ae8e331187c522b020.js
2019-08-05 15:21:54.528 10650-10650/com.neonxorg.neonx E/File: /storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/service-worker.js
2019-08-05 15:21:54.528 10650-10650/com.neonxorg.neonx E/File: /storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/static
2019-08-05 15:21:54.528 10650-10650/com.neonxorg.neonx E/File: /storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/favicon.ico
2019-08-05 15:21:54.528 10650-10650/com.neonxorg.neonx E/File: /storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/manifest.json
2019-08-05 15:21:54.528 10650-10650/com.neonxorg.neonx E/File: /storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/asset-manifest.json
2019-08-05 15:21:54.528 10650-10650/com.neonxorg.neonx E/File: /storage/emulated/0/Android/data/com.neonxorg.neonx/cache/www/index.html
2019-08-05 15:21:54.704 10650-10650/com.neonxorg.neonx E/MainActivity: Connected : Please access! http://192.168.1.2:3000 From a web browser
代码：
public final String TAG = getClass().getSimpleName();
public void startLocalServer(int port, String root, Boolean localhost, Boolean keepAlive) {
try {
String[] filePathList = (getAssets().list("www"));
Log.e(TAG,"-------Assets List-----");
for (String s : filePathList) {
Log.e(TAG, s);
}
File externalCache = getExternalCacheDir();
if (externalCache != null) {
String path = externalCache.getAbsolutePath() + "/" + root;
copyFolderFromAssets(getApplicationContext(), "www", path);
File www_root = new File(path);
Log.e(TAG,"-------Root File List-----");
for (File f : www_root.listFiles()) {
Log.e("File ", f.getAbsolutePath());
}
server = new WebServer("localhost", port, www_root.getCanonicalFile());
server.start();
printIp();
}
} catch (IOException e) {
Log.e(TAG, Log.getStackTraceString(e));
}
}
public void copyFolderFromAssets(Context context, String rootDirFullPath, String targetDirFullPath) {
Log.e(TAG,"copyFolderFromAssets " + "rootDirFullPath-" + rootDirFullPath + " targetDirFullPath-" + targetDirFullPath);
File file = new File(targetDirFullPath);
if (!file.exists()) {
new File(targetDirFullPath).mkdirs();
}
try {
String[] listFiles = context.getAssets().list(rootDirFullPath);// 遍历该目录下的文件和文件夹
for (String string : listFiles) {// 看起子目录是文件还是文件夹，这里只好用.做区分了
if (isFileByName(string)) {// 文件
copyFileFromAssets(context, rootDirFullPath + "/" + string, targetDirFullPath + "/" + string);
} else {// 文件夹
String childRootDirFullPath = rootDirFullPath + "/" + string;
String childTargetDirFullPath = targetDirFullPath + "/" + string;
new File(childTargetDirFullPath).mkdirs();
copyFolderFromAssets(context, childRootDirFullPath, childTargetDirFullPath);
}
}
} catch (IOException e) {
Log.e(TAG, Log.getStackTraceString(e));
}
}
public void copyFileFromAssets(Context context, String assetsFilePath, String targetFileFullPath) {
InputStream assestsFileInputStream;
try {
assestsFileInputStream = context.getAssets().open(assetsFilePath);
FileOutputStream fOS = new FileOutputStream(new File(targetFileFullPath));
int length = -1;
byte[] buf = new byte[1024];
while ((length = assestsFileInputStream.read(buf)) != -1) {
fOS.write(buf, 0, length);
}
fOS.flush();
} catch (IOException e) {
Log.e(TAG, Log.getStackTraceString(e));
}
}
private boolean isFileByName(String str) {
return str.contains(".");
}
private void printIp() {
WifiManager wifiManager = (WifiManager) getApplicationContext().getSystemService(WIFI_SERVICE);
int ipAddress = wifiManager.getConnectionInfo().getIpAddress();
final String formatedIpAddress = String.format("%d.%d.%d.%d", (ipAddress & 0xff), (ipAddress >> 8 & 0xff),
(ipAddress >> 16 & 0xff), (ipAddress >> 24 & 0xff));
Log.e(TAG,"Connected : " + "Please access! http://" + formatedIpAddress + ":" + server.getListeningPort() + " From a web browser");
}
given path is not a directory.
当 nanphttpd 无法定位数据时，它会给出此错误。
Why You are not getting the actual error
在 copyFolderFromAssets 和 copyFileFromAssets 的 catch 块中，您正在使用 e.printStackTrace()，由于 Show only，它可能不会显示在您的 LogCat 上所选应用程序 过滤器
为了打印错误，您需要使用以下内容：
Log.e(TAG, Log.getStackTraceString(e));
我用 Log.e 语句替换了你所有的 System.out 和 e.printStackTrace。应用程序很可能无法将内容从 www 目录复制到目标目录。我将目标目录更改为缓存目录，它在我的设备上运行。 （见下文）：
File externalCache = getExternalCacheDir();
if (externalCache != null) {
String path = externalCache.getAbsolutePath() + "/" + root;
File www_root = new File(path);
copyFolderFromAssets(getApplicationContext(), "www", path);
Log.e(TAG,"-------Root File List-----");
for (File f : www_root.listFiles()) {
Log.e("File ", f.getAbsolutePath());
}
server = new WebServer("localhost", port, www_root.getCanonicalFile());
server.start();
printIp();
}
旁注：
- 不需要在这些函数中使用
static关键字，直到或除非您想将它们复制到实用程序中 class