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client Thread는 다음과 같이 작성되었습니다.
<pre style="background-color: #2b2b2b; color: #a9b7c6; font-family: 'Consolas'; font-size: 9.8pt;">var client = OkHttpClient() var request_builder = Request.Builder() var url = request_builder.url("http://172.30.1.18:8080/MobileServer/upload.jsp") var multipart_Builder = MultipartBody.Builder() var file = File(pic_path) multipart_Builder.addFormDataPart("mobile_img",file.name,RequestBody.create(MultipartBody.FORM, file)) var body = multipart_Builder.build() var post = url.post(body) var request = post.build() client.newCall(request).execute()</pre>
server 코드는 다음과 같이 작성되었습니다.
<%@ page import="com.oreilly.servlet.*" %>
<%@ page import="com.oreilly.servlet.multipart.*" %>
<%@ page import="com.oreilly.servlet.MultipartRequest"%>


<%
 request.setCharacterEncoding("utf-8");

 String path = getServletContext().getRealPath("upload");
 System.out.println(path);
 
 int max = 1024 * 1024 * 100;
 DefaultFileRenamePolicy policy = new DefaultFileRenamePolicy();
 System.out.println(request.getContentType());
 new MultipartRequest(request, path,max,"multipart/form-data",policy);
 
%>

server에서 이미지를 받는데 에러나 나서 업로드가 불가합니다.

다음과 같은 충돌 에러가 뜨네요&nbsp;
Capturing and displaying logcat messages from application. This behavior can be disabled in the "Logcat output" section of the "Debugger" settings page.
I/zygote64: Rejecting re-init on previously-failed class java.lang.Class<okhttp3.internal.platform.ConscryptPlatform$configureTrustManager$1>: java.lang.NoClassDefFoundError: Failed resolution of: Lorg/conscrypt/ConscryptHostnameVerifier;
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.platform.android.SocketAdapter okhttp3.internal.platform.android.ConscryptSocketAdapter$Companion.buildIfSupported() (ConscryptSocketAdapter.kt:62)
&nbsp; &nbsp; &nbsp; &nbsp; at void okhttp3.internal.platform.AndroidPlatform.<init>() (AndroidPlatform.kt:44)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.platform.Platform okhttp3.internal.platform.AndroidPlatform$Companion.buildIfSupported() (AndroidPlatform.kt:212)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.platform.Platform okhttp3.internal.platform.Platform$Companion.findPlatform() (Platform.kt:212)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.platform.Platform okhttp3.internal.platform.Platform$Companion.access$findPlatform(okhttp3.internal.platform.Platform$Companion) (Platform.kt:169)
&nbsp; &nbsp; &nbsp; &nbsp; at void okhttp3.internal.platform.Platform.<clinit>() (Platform.kt:170)
&nbsp; &nbsp; &nbsp; &nbsp; at void okhttp3.OkHttpClient.<init>(okhttp3.OkHttpClient$Builder) (OkHttpClient.kt:224)
&nbsp; &nbsp; &nbsp; &nbsp; at void okhttp3.OkHttpClient.<init>() (OkHttpClient.kt:216)
I/zygote64:&nbsp; &nbsp; &nbsp;at void com.example.network_project2.MainActivity$NetworkThread.run() (MainActivity.kt:22)
&nbsp; &nbsp; Caused by: java.lang.ClassNotFoundException: Didn't find class "org.conscrypt.ConscryptHostnameVerifier" on path: DexPathList[[zip file "/data/app/com.example.network_project2-Mp_L8AN3j6KqUzJuKsCTUw==/base.apk"],nativeLibraryDirectories=[/data/app/com.example.network_project2-Mp_L8AN3j6KqUzJuKsCTUw==/lib/x86_64, /system/lib64, /vendor/lib64]]
&nbsp; &nbsp; &nbsp; &nbsp; at java.lang.Class dalvik.system.BaseDexClassLoader.findClass(java.lang.String) (BaseDexClassLoader.java:125)
&nbsp; &nbsp; &nbsp; &nbsp; at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String, boolean) (ClassLoader.java:379)
&nbsp; &nbsp; &nbsp; &nbsp; at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String) (ClassLoader.java:312)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.platform.android.SocketAdapter okhttp3.internal.platform.android.ConscryptSocketAdapter$Companion.buildIfSupported() (ConscryptSocketAdapter.kt:62)
&nbsp; &nbsp; &nbsp; &nbsp; at void okhttp3.internal.platform.AndroidPlatform.<init>() (AndroidPlatform.kt:44)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.platform.Platform okhttp3.internal.platform.AndroidPlatform$Companion.buildIfSupported() (AndroidPlatform.kt:212)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.platform.Platform okhttp3.internal.platform.Platform$Companion.findPlatform() (Platform.kt:212)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.platform.Platform okhttp3.internal.platform.Platform$Companion.access$findPlatform(okhttp3.internal.platform.Platform$Companion) (Platform.kt:169)
&nbsp; &nbsp; &nbsp; &nbsp; at void okhttp3.internal.platform.Platform.<clinit>() (Platform.kt:170)
&nbsp; &nbsp; &nbsp; &nbsp; at void okhttp3.OkHttpClient.<init>(okhttp3.OkHttpClient$Builder) (OkHttpClient.kt:224)
I/zygote64:&nbsp; &nbsp; &nbsp;at void okhttp3.OkHttpClient.<init>() (OkHttpClient.kt:216)
&nbsp; &nbsp; &nbsp; &nbsp; at void com.example.network_project2.MainActivity$NetworkThread.run() (MainActivity.kt:22)
&nbsp; &nbsp; Rejecting re-init on previously-failed class java.lang.Class<okhttp3.internal.platform.ConscryptPlatform$configureTrustManager$1>: java.lang.NoClassDefFoundError: Failed resolution of: Lorg/conscrypt/ConscryptHostnameVerifier;
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.platform.android.SocketAdapter okhttp3.internal.platform.android.ConscryptSocketAdapter$Companion.buildIfSupported() (ConscryptSocketAdapter.kt:62)
&nbsp; &nbsp; &nbsp; &nbsp; at void okhttp3.internal.platform.AndroidPlatform.<init>() (AndroidPlatform.kt:44)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.platform.Platform okhttp3.internal.platform.AndroidPlatform$Companion.buildIfSupported() (AndroidPlatform.kt:212)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.platform.Platform okhttp3.internal.platform.Platform$Companion.findPlatform() (Platform.kt:212)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.platform.Platform okhttp3.internal.platform.Platform$Companion.access$findPlatform(okhttp3.internal.platform.Platform$Companion) (Platform.kt:169)
&nbsp; &nbsp; &nbsp; &nbsp; at void okhttp3.internal.platform.Platform.<clinit>() (Platform.kt:170)
&nbsp; &nbsp; &nbsp; &nbsp; at void okhttp3.OkHttpClient.<init>(okhttp3.OkHttpClient$Builder) (OkHttpClient.kt:224)
&nbsp; &nbsp; &nbsp; &nbsp; at void okhttp3.OkHttpClient.<init>() (OkHttpClient.kt:216)
&nbsp; &nbsp; &nbsp; &nbsp; at void com.example.network_project2.MainActivity$NetworkThread.run() (MainActivity.kt:22)
&nbsp; &nbsp; Caused by: java.lang.ClassNotFoundException: Didn't find class "org.conscrypt.ConscryptHostnameVerifier" on path: DexPathList[[zip file "/data/app/com.example.network_project2-Mp_L8AN3j6KqUzJuKsCTUw==/base.apk"],nativeLibraryDirectories=[/data/app/com.example.network_project2-Mp_L8AN3j6KqUzJuKsCTUw==/lib/x86_64, /system/lib64, /vendor/lib64]]
&nbsp; &nbsp; &nbsp; &nbsp; at java.lang.Class dalvik.system.BaseDexClassLoader.findClass(java.lang.String) (BaseDexClassLoader.java:125)
I/zygote64:&nbsp; &nbsp; &nbsp;at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String, boolean) (ClassLoader.java:379)
&nbsp; &nbsp; &nbsp; &nbsp; at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String) (ClassLoader.java:312)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.platform.android.SocketAdapter okhttp3.internal.platform.android.ConscryptSocketAdapter$Companion.buildIfSupported() (ConscryptSocketAdapter.kt:62)
&nbsp; &nbsp; &nbsp; &nbsp; at void okhttp3.internal.platform.AndroidPlatform.<init>() (AndroidPlatform.kt:44)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.platform.Platform okhttp3.internal.platform.AndroidPlatform$Companion.buildIfSupported() (AndroidPlatform.kt:212)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.platform.Platform okhttp3.internal.platform.Platform$Companion.findPlatform() (Platform.kt:212)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.platform.Platform okhttp3.internal.platform.Platform$Companion.access$findPlatform(okhttp3.internal.platform.Platform$Companion) (Platform.kt:169)
&nbsp; &nbsp; &nbsp; &nbsp; at void okhttp3.internal.platform.Platform.<clinit>() (Platform.kt:170)
&nbsp; &nbsp; &nbsp; &nbsp; at void okhttp3.OkHttpClient.<init>(okhttp3.OkHttpClient$Builder) (OkHttpClient.kt:224)
&nbsp; &nbsp; &nbsp; &nbsp; at void okhttp3.OkHttpClient.<init>() (OkHttpClient.kt:216)
&nbsp; &nbsp; &nbsp; &nbsp; at void com.example.network_project2.MainActivity$NetworkThread.run() (MainActivity.kt:22)
D/NetworkSecurityConfig: No Network Security Config specified, using platform default
E/AndroidRuntime: FATAL EXCEPTION: Thread-2
&nbsp; &nbsp; Process: com.example.network_project2, PID: 16577
&nbsp; &nbsp; java.net.SocketException: socket failed: EACCES (Permission denied)
&nbsp; &nbsp; &nbsp; &nbsp; at java.net.Socket.createImpl(Socket.java:487)
&nbsp; &nbsp; &nbsp; &nbsp; at java.net.Socket.getImpl(Socket.java:547)
&nbsp; &nbsp; &nbsp; &nbsp; at java.net.Socket.setSoTimeout(Socket.java:1175)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.kt:281)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.connection.RealConnection.connect(RealConnection.kt:195)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.connection.ExchangeFinder.findConnection(ExchangeFinder.kt:233)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.connection.ExchangeFinder.findHealthyConnection(ExchangeFinder.kt:107)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.connection.ExchangeFinder.find(ExchangeFinder.kt:75)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.connection.RealCall.initExchange$okhttp(RealCall.kt:245)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.kt:32)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:100)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.kt:82)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:100)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.kt:83)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:100)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.kt:74)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:100)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.connection.RealCall.getResponseWithInterceptorChain$okhttp(RealCall.kt:197)
&nbsp; &nbsp; &nbsp; &nbsp; at okhttp3.internal.connection.RealCall.execute(RealCall.kt:148)
&nbsp; &nbsp; &nbsp; &nbsp; at com.example.network_project2.MainActivity$NetworkThread.run(MainActivity.kt:27)
D/EGL_emulation: eglMakeCurrent: 0x762114e3dfa0: ver 3 1 (tinfo 0x762114e0d4a0)
D/OpenGLRenderer: endAllActiveAnimators on 0x7621123ff800 (RippleDrawable) with handle 0x76210776f600

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