docs: add Linux (WSL/Ubuntu) quick start and build/test instructions

CMakeLists.txt

@@ -70,6 +70,7 @@ install(FILES ${HEADERS} DESTINATION include/privatebinapi)
 include(CTest)
 enable_testing()
 add_subdirectory(tests)
+add_subdirectory(example)
 
 # ===================== LLVM/clang-cl Coverage (optional) =====================
 option(ENABLE_LLVM_COVERAGE "Enable LLVM/clang-cl coverage instrumentation" OFF)

README.md

@@ -70,6 +70,60 @@ cmake -S example -B example/build -DCMAKE_BUILD_TYPE=Release
 cmake --build example/build --config Release
 ```
 
+### Linux (WSL/Ubuntu) – Quick start
+
+Prerequisites (Ubuntu/Debian):
+
+```bash
+sudo apt-get update -y && sudo apt-get install -y \
+  build-essential cmake git pkg-config libcurl4-openssl-dev \
+  curl zip unzip tar ninja-build ca-certificates
+```
+
+Bootstrap vcpkg (once):
+
+```bash
+git clone https://github.com/microsoft/vcpkg.git "$HOME/vcpkg"
+"$HOME/vcpkg/bootstrap-vcpkg.sh" -disableMetrics
+```
+
+Build (library, tests, example):
+
+```bash
+export VCPKG_ROOT="$HOME/vcpkg"
+cmake -S . -B build -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release -DCMAKE_TOOLCHAIN_FILE="$VCPKG_ROOT/scripts/buildsystems/vcpkg.cmake"
+cmake --build build --config Release
+```
+
+Or simply use the helper script:
+
+```bash
+bash ./build.sh
+```
+
+Run the example:
+
+```bash
+./build/example/example
+```
+
+Run tests:
+
+```bash
+ctest --test-dir build --output-on-failure
+```
+
+Artifacts:
+
+- Library: `build/libprivatebinapi.so`
+- Example binary: `build/example/example`
+
+Notes:
+
+- vcpkg dependencies (`cryptopp`, `nlohmann-json`) are installed automatically during CMake configure when the toolchain file is provided.
+- On Linux the example links directly against the in-tree target `privatebinapi`. On Windows it additionally copies the DLL next to the example executable after build.
+- PrivateBin delete operation is performed via HTTP POST (per API), not HTTP DELETE.
+
 ### Windows (PowerShell) – Build via build_thinkpad.bat
 
 For systems with Visual Studio 2022 Build Tools (C++ workload) and vcpkg in the user profile, there is a robust build script:

build.sh

@@ -1,15 +1,22 @@
 #!/bin/bash
-echo "Building PrivateBin API C++ DLL..."
+set -euo pipefail
+echo "Building PrivateBin API C++ (library + example)"
 
-# Create build directory
-mkdir -p build
-cd build
+# Ensure vcpkg exists
+VCPKG_ROOT="${VCPKG_ROOT:-$HOME/vcpkg}"
+if [ ! -d "$VCPKG_ROOT" ]; then
+  echo "vcpkg not found under $VCPKG_ROOT, cloning..."
+  git clone https://github.com/microsoft/vcpkg.git "$VCPKG_ROOT"
+  "$VCPKG_ROOT/bootstrap-vcpkg.sh" -disableMetrics
+fi
 
-# Generate build files with CMake
-cmake ..
+# Clean and configure
+rm -rf build
+cmake -S . -B build -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release -DCMAKE_TOOLCHAIN_FILE="$VCPKG_ROOT/scripts/buildsystems/vcpkg.cmake"
 
-# Build the project
-make
+# Build all targets
+cmake --build build --config Release
 
-echo "Build completed!"
-cd ..
+echo "Build completed. Artifacts:"
+echo " - Library: build/libprivatebinapi.so"
+echo " - Example: build/example/example"

example/CMakeLists.txt

@@ -3,25 +3,15 @@ project(PrivateBinAPIExample)
 
 set(CMAKE_CXX_STANDARD 17)
 
-# Use the prebuilt library from the parent build directory
-set(PRIVATEBINAPI_BUILD_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../build")
-set(PRIVATEBINAPI_RELEASE_LIB "${PRIVATEBINAPI_BUILD_DIR}/Release/privatebinapi.lib")
-
-if(EXISTS "${PRIVATEBINAPI_RELEASE_LIB}")
-    set(PRIVATEBINAPI_LIB "${PRIVATEBINAPI_RELEASE_LIB}")
-else()
-    # Fallback: try the build root (multi-config generators may place libs differently)
-    find_library(PRIVATEBINAPI_LIB privatebinapi PATHS "${PRIVATEBINAPI_BUILD_DIR}")
-endif()
-
-if(NOT PRIVATEBINAPI_LIB)
-    message(FATAL_ERROR "privatebinapi library not found. Please run build.bat in the project root first.")
-endif()
-
+# Build example and link against the in-tree target
 add_executable(example example.cpp)
+target_link_libraries(example PRIVATE privatebinapi)
 
-target_link_libraries(example PRIVATE ${PRIVATEBINAPI_LIB} winhttp)
-
-target_include_directories(example PRIVATE 
-    ${CMAKE_CURRENT_SOURCE_DIR}/../include
-)
+# On Windows, copy the DLL next to the example for easy execution
+if(WIN32)
+    add_custom_command(TARGET example POST_BUILD
+        COMMAND ${CMAKE_COMMAND} -E copy_if_different
+                $<TARGET_FILE:privatebinapi>
+                $<TARGET_FILE_DIR:example>
+    )
+endif()

src/http_client.cpp

@@ -585,7 +585,7 @@ bool HttpClient::delete_req(const std::string& url, const std::string& data, std
     }
     
     curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
-    curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "DELETE");
+    // PrivateBin API erwartet POST für delete
     curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data.c_str());
     curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
     curl_easy_setopt(curl, CURLOPT_WRITEDATA, &response);

tests/CMakeLists.txt

@@ -25,4 +25,13 @@ target_include_directories(test_basic PRIVATE
 )
 
 # Register the test with CTest
-add_test(NAME test_basic COMMAND test_basic)
+add_test(NAME test_basic COMMAND test_basic)
+
+# Optional example run as a test (requires network and live server)
+# Example-Test nur aktiv, wenn PRIVATEBIN_IT=1 gesetzt ist
+add_test(NAME example_run COMMAND $<TARGET_FILE:example>)
+if(DEFINED ENV{PRIVATEBIN_IT} AND NOT "$ENV{PRIVATEBIN_IT}" STREQUAL "0")
+    set_tests_properties(example_run PROPERTIES DISABLED FALSE)
+else()
+    set_tests_properties(example_run PROPERTIES DISABLED TRUE)
+endif()