http: 修复32位系统下，下载3GB以上文件失败的问题: #1446

ZLToolKit @ 9d312404

-Subproject commit 6a661111ea029538e1fafa505cb6e8bba8c95551
+Subproject commit 9d3124047d1ec64bf1674ae71bd4fddd728d2243

src/Http/HttpBody.cpp

@@ -205,7 +205,7 @@ int64_t HttpFileBody::remainSize() {
 }
 
 Buffer::Ptr HttpFileBody::readData(size_t size) {
-    size = MIN((size_t)remainSize(), size);
+    size = (size_t)(MIN(remainSize(), (int64_t)size));
     if (!size) {
         //没有剩余字节了
         return nullptr;

src/Http/HttpFileManager.cpp

@@ -159,18 +159,15 @@ static bool makeFolderMenu(const string &httpPath, const string &strFullPath, st
             continue;
         }
         //是文件
-        struct stat fileData;
-        if (0 == stat(strAbsolutePath.data(), &fileData)) {
-            auto &fileSize = fileData.st_size;
+        auto fileSize = File::fileSize(strAbsolutePath.data());
         if (fileSize < 1024) {
-                ss << " (" << fileData.st_size << "B)" << endl;
+            ss << " (" << fileSize << "B)" << endl;
         } else if (fileSize < 1024 * 1024) {
-                ss << fixed << setprecision(2) << " (" << fileData.st_size / 1024.0 << "KB)";
+            ss << fixed << setprecision(2) << " (" << fileSize / 1024.0 << "KB)";
         } else if (fileSize < 1024 * 1024 * 1024) {
-                ss << fixed << setprecision(2) << " (" << fileData.st_size / 1024 / 1024.0 << "MB)";
+            ss << fixed << setprecision(2) << " (" << fileSize / 1024 / 1024.0 << "MB)";
         } else {
-                ss << fixed << setprecision(2) << " (" << fileData.st_size / 1024 / 1024 / 1024.0 << "GB)";
-            }
+            ss << fixed << setprecision(2) << " (" << fileSize / 1024 / 1024 / 1024.0 << "GB)";
         }
         ss << "</a></li>\r\n";
     }