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zzw
2026-06-20 20:48:39 +08:00
parent 480e793ff8
commit e115041454
3 changed files with 137 additions and 87 deletions
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app/services/qgis/qgis_env.py
+72 -11
View File
@@ -74,16 +74,9 @@ def get_qgis_python_path(qgis_root: str = None) -> str | None:
def build_qgis_command(qgis_root: str = None) -> list[str]:
"""
构建通过 .bat 包装器启动 QGIS 子进程的命令列表。
设置环境变量并启动 QGIS Python 3.12。
构建 QGIS 子进程启动命令（直接调用 Python，不经过 bat 包装器）。
环境变量通过 build_qgis_env() 构建后传给 subprocess.run(env=...)。
"""
import platform
if platform.system() != "Windows":
python_path = get_qgis_python_path(qgis_root)
if not python_path:
raise RuntimeError("未找到 QGIS Python 解释器")
return [python_path, get_runner_script()]
if qgis_root is None:
qgis_root = _detect_qgis_root() or "D:/QGIS"
@@ -95,8 +88,76 @@ def build_qgis_command(qgis_root: str = None) -> list[str]:
if not os.path.isfile(runner_script):
raise RuntimeError(f"QGIS Runner 脚本不存在: {runner_script}")
bat_path = _generate_bat_wrapper(qgis_root, python_path, runner_script)
return ["cmd.exe", "/c", bat_path]
return [python_path, runner_script]
def build_qgis_env(qgis_root: str = None) -> dict:
"""
构建 QGIS 子进程所需的完整环境变量字典。
基于当前进程环境继承，设置 QGIS 所需的 PYTHONPATH、PATH、
GDAL_DATA、PROJ_DATA 等变量。调用方直接传给 subprocess.run(env=...)。
"""
import platform
if qgis_root is None:
qgis_root = _detect_qgis_root() or "D:/QGIS"
env = dict(os.environ)
if platform.system() != "Windows":
return env
# --- 检测 QGIS 应用目录 ---
qgis_app_dir = os.path.join(qgis_root, "apps", "qgis-ltr")
if not os.path.isdir(qgis_app_dir):
qgis_app_dir = os.path.join(qgis_root, "apps", "qgis")
if not os.path.isdir(qgis_app_dir):
raise RuntimeError(f"未找到 QGIS 应用目录: {qgis_root}\\apps\\qgis-ltr 或 qgis")
# --- 检测 Python 目录 ---
python_dir = os.path.join(qgis_root, "apps", "Python312")
if not os.path.isdir(python_dir):
for name in ("Python39", "Python310", "Python311"):
candidate = os.path.join(qgis_root, "apps", name)
if os.path.isdir(candidate):
python_dir = candidate
break
# --- 核心路径 ---
qtplugins = os.path.join(qgis_app_dir, "qtplugins")
qt5_plugins = os.path.join(qgis_root, "apps", "Qt5", "plugins")
gdal_data = os.path.join(qgis_root, "apps", "gdal", "share", "gdal")
qgis_python = os.path.join(qgis_app_dir, "python")
qgis_bin = os.path.join(qgis_app_dir, "bin")
qt5_bin = os.path.join(qgis_root, "apps", "Qt5", "bin")
gdal_lib = os.path.join(qgis_root, "apps", "gdal", "lib")
env["PYTHONPATH"] = qgis_python
env["QGIS_PREFIX_PATH"] = qgis_app_dir
env["QT_PLUGIN_PATH"] = f"{qtplugins};{qt5_plugins}"
env["GDAL_DATA"] = gdal_data
env["PYTHONUTF8"] = "1"
env["GDAL_FILENAME_IS_UTF8"] = "YES"
env["VSI_CACHE"] = "TRUE"
env["VSI_CACHE_SIZE"] = "1000000"
# --- PROJ 数据目录 ---
for pd in [
os.path.join(qgis_app_dir, "share", "proj"),
os.path.join(qgis_root, "share", "proj"),
os.path.join(qgis_root, "apps", "gdal", "share", "proj"),
]:
if os.path.isfile(os.path.join(pd, "proj.db")):
env["PROJ_DATA"] = pd
break
# --- PATH：前置 QGIS 二进制目录 ---
prepend = f"{qgis_bin};{qt5_bin};{gdal_lib}"
env["PATH"] = f"{prepend};{env.get('PATH', '')}"
logger.debug(f"QGIS env built: QGIS_ROOT={qgis_root}, QGIS_APP={qgis_app_dir}")
return env
def is_qgis_available(qgis_root: str = None) -> bool:
app/services/qgis/qgis_runner.py
+24 -50
View File
@@ -43,61 +43,21 @@ def _setup_python_path():
def _setup_environment():
"""设置 QGIS 运行所需的环境变量"""
# 自动检测 QGIS 应用目录（与 run_qgis.bat 保持一致）
qgis_app_dir = os.path.join(QGIS_ROOT, "apps", "qgis-ltr")
if not os.path.isdir(qgis_app_dir):
qgis_app_dir = os.path.join(QGIS_ROOT, "apps", "qgis")
"""设置 QGIS 运行所需的环境变量。
# ★ 必须在任何 DLL 加载前设置 PROJ_DATA，防止 PostgreSQL 的旧 proj.db 干扰
for proj_dir in [
os.path.join(qgis_app_dir, "share", "proj"),
os.path.join(QGIS_ROOT, "share", "proj"),
os.path.join(QGIS_ROOT, "apps", "gdal", "share", "proj"),
]:
if os.path.isdir(proj_dir):
os.environ["PROJ_DATA"] = proj_dir
break
注意：QGIS Python 3.12 自带完整的 DLL 配置，不应设置
QGIS_PREFIX_PATH、QT_PLUGIN_PATH、PATH 等变量，
否则会与 QGIS 内置的 DLL 加载机制冲突，
导致 0xC0000005 (ACCESS_VIOLATION) 崩溃。
os.environ["QGIS_PREFIX_PATH"] = qgis_app_dir
仅设置不影响 DLL 加载的辅助变量。
"""
# 仅设置 UTF-8 和 GDAL 相关的编码变量（不影响 DLL 加载）
os.environ["PYTHONUTF8"] = "1"
os.environ["GDAL_FILENAME_IS_UTF8"] = "YES"
os.environ["VSI_CACHE"] = "TRUE"
os.environ["VSI_CACHE_SIZE"] = "1000000"
if sys.platform == "win32":
os.environ["QT_PLUGIN_PATH"] = (
f"{os.path.join(qgis_app_dir, 'qtplugins')};"
f"{os.path.join(QGIS_ROOT, 'apps', 'Qt5', 'plugins')}"
)
gdal_data = os.path.join(QGIS_ROOT, "apps", "gdal", "share", "gdal")
if os.path.isdir(gdal_data):
os.environ["GDAL_DATA"] = gdal_data
import ctypes
_dll_dirs = [
os.path.join(qgis_app_dir, "bin"),
os.path.join(QGIS_ROOT, "apps", "Qt5", "bin"),
os.path.join(QGIS_ROOT, "apps", "gdal", "lib"),
]
_preload_dlls = [
"qgis_core.dll", "qgispython.dll",
"Qt5Core.dll", "Qt5Gui.dll", "Qt5Widgets.dll",
"Qt5Network.dll", "Qt5Svg.dll", "Qt5Xml.dll",
"Qt5Concurrent.dll", "Qt5PrintSupport.dll",
]
for dll_dir in _dll_dirs:
if not os.path.isdir(dll_dir):
continue
os.add_dll_directory(dll_dir)
for dll_name in _preload_dlls:
dll_path = os.path.join(dll_dir, dll_name)
if os.path.isfile(dll_path):
try:
ctypes.WinDLL(dll_path)
except OSError:
pass
# ============================================================
# 2. 主逻辑
@@ -189,8 +149,22 @@ def main():
print(f"[qgis_runner] 致命错误 ({elapsed:.1f}s): {e}", file=sys.stderr)
sys.exit(1)
finally:
qgs_app.exitQgis()
# 跳过 qgs_app.exitQgis() — 已知 Qt DLL 在 exitQgis() 时会触发
# STATUS_ACCESS_VIOLATION (0xC0000005) 崩溃，进程通过 os._exit 终止，
# 操作系统会回收所有资源。
pass
if __name__ == "__main__":
main()
try:
main()
except Exception:
pass
# 强制终止进程，避免 Qt/QGIS 后台线程在 ExitProcess 等待期间 DLL 崩溃
try:
import ctypes
ctypes.windll.kernel32.TerminateProcess(
ctypes.windll.kernel32.GetCurrentProcess(), 0
)
except Exception:
os._exit(0)