From 28e1770f27bb335d29bfa44a5c963904007b5e73 Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Fri, 27 Dec 2019 17:42:04 +0100
Subject: CurlFileHandle: set UserAgent

---
 src/filemanager.cpp | 86 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)

(limited to 'src/filemanager.cpp')

diff --git a/src/filemanager.cpp b/src/filemanager.cpp
index a279a6cf..625dca03 100644
--- a/src/filemanager.cpp
+++ b/src/filemanager.cpp
@@ -61,8 +61,22 @@ class MyMutex {
 #include <sqlite3.h> // for sqlite3_snprintf
 #endif
 
+#if defined(__linux)
+#include <unistd.h>
+#elif defined(_WIN32)
+#include <windows.h>
+#elif defined(__MACH__) && defined(__APPLE__)
+#include <mach-o/dyld.h>
+#elif defined(__FreeBSD__)
+#include <sys/sysctl.h>
+#include <sys/types.h>
+#endif
+
 //! @cond Doxygen_Suppress
 
+#define STR_HELPER(x) #x
+#define STR(x) STR_HELPER(x)
+
 using namespace NS_PROJ::internal;
 
 NS_PROJ_START
@@ -546,6 +560,7 @@ struct CurlFileHandle {
     CURL *m_handle;
     std::string m_headers{};
     std::string m_lastval{};
+    std::string m_useragent{};
     char m_szCurlErrBuf[CURL_ERROR_SIZE + 1] = {};
 
     CurlFileHandle(const CurlFileHandle &) = delete;
@@ -562,6 +577,67 @@ struct CurlFileHandle {
 
 // ---------------------------------------------------------------------------
 
+static std::string GetExecutableName() {
+#if defined(__linux)
+    std::string path;
+    path.resize(1024);
+    const auto ret = readlink("/proc/self/exe", &path[0], path.size());
+    if (ret > 0) {
+        path.resize(ret);
+        const auto pos = path.rfind('/');
+        if (pos != std::string::npos) {
+            path = path.substr(pos + 1);
+        }
+        return path;
+    }
+#elif defined(_WIN32)
+    std::string path;
+    path.resize(1024);
+    if (GetModuleFileNameA(nullptr, &path[0],
+                           static_cast<DWORD>(path.size()))) {
+        path.resize(strlen(path.c_str()));
+        const auto pos = path.rfind('\\');
+        if (pos != std::string::npos) {
+            path = path.substr(pos + 1);
+        }
+        return path;
+    }
+#elif defined(__MACH__) && defined(__APPLE__)
+    std::string path;
+    path.resize(1024);
+    uint32_t size = static_cast<uint32_t>(path.size());
+    if (_NSGetExecutablePath(&path[0], &size) == 0) {
+        path.resize(strlen(path.c_str()));
+        const auto pos = path.rfind('/');
+        if (pos != std::string::npos) {
+            path = path.substr(pos + 1);
+        }
+        return path;
+    }
+#elif defined(__FreeBSD__)
+    int mib[4];
+    mib[0] = CTL_KERN;
+    mib[1] = KERN_PROC;
+    mib[2] = KERN_PROC_PATHNAME;
+    mib[3] = -1;
+    std::string path;
+    path.resize(1024);
+    size_t size = path.size();
+    if (sysctl(mib, 4, &path[0], &size, nullptr, 0) == 0) {
+        path.resize(strlen(path.c_str()));
+        const auto pos = path.rfind('/');
+        if (pos != std::string::npos) {
+            path = path.substr(pos + 1);
+        }
+        return path;
+    }
+#endif
+
+    return std::string();
+}
+
+// ---------------------------------------------------------------------------
+
 CurlFileHandle::CurlFileHandle(const char *url, CURL *handle)
     : m_url(url), m_handle(handle) {
     curl_easy_setopt(handle, CURLOPT_URL, m_url.c_str());
@@ -584,6 +660,16 @@ CurlFileHandle::CurlFileHandle(const char *url, CURL *handle)
     }
 
     curl_easy_setopt(handle, CURLOPT_ERRORBUFFER, m_szCurlErrBuf);
+
+    if (getenv("PROJ_NO_USERAGENT") == nullptr) {
+        m_useragent = "PROJ " STR(PROJ_VERSION_MAJOR) "." STR(
+            PROJ_VERSION_MINOR) "." STR(PROJ_VERSION_PATCH);
+        const auto exeName = GetExecutableName();
+        if (!exeName.empty()) {
+            m_useragent = exeName + " using " + m_useragent;
+        }
+        curl_easy_setopt(handle, CURLOPT_USERAGENT, m_useragent.data());
+    }
 }
 
 // ---------------------------------------------------------------------------
-- 
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