File size: 3,988 Bytes
8ffb677 cc826a1 8ffb677 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 | import logging
import io
from pathlib import Path
from typing import List
from PIL import Image
from fastapi import APIRouter, Form, UploadFile, HTTPException
from fastapi.responses import Response
logger = logging.getLogger(__name__)
router = APIRouter()
plugin = None
def set_plugin_instance(plugin_instance):
global plugin
plugin = plugin_instance
@router.get("/status")
async def get_status():
if plugin is None:
return {
"name": "image",
"enabled": False,
"message": "插件未加载",
}
return plugin.get_status()
@router.post("/upload")
async def upload_image(file: UploadFile):
if plugin is None or not plugin.enabled:
raise HTTPException(status_code=400, detail="插件未启用")
allowed_extensions = {".png", ".jpg", ".jpeg", ".gif", ".bmp", ".webp"}
ext = Path(file.filename).suffix.lower()
if ext not in allowed_extensions:
raise HTTPException(
status_code=400,
detail=f"不支持的文件格式: {ext}，仅支持 {', '.join(allowed_extensions)}",
)
content_bytes = await file.read()
try:
image = Image.open(io.BytesIO(content_bytes))
image_format = image.format or "PNG"
sizes = [16, 32, 48, 128]
available_sizes = []
for size in sizes:
if image.width >= size and image.height >= size:
available_sizes.append(size)
if not available_sizes:
raise HTTPException(
status_code=400,
detail=f"图片尺寸 ({image.width}x{image.height}) 小于最小要求 16x16",
)
return {
"filename": file.filename,
"original_size": {"width": image.width, "height": image.height},
"format": image_format,
"available_sizes": available_sizes,
"sizes": sizes,
}
except Exception as e:
logger.error(f"处理图片失败: {e}")
raise HTTPException(status_code=400, detail=f"图片处理失败: {str(e)}")
@router.post("/generate")
async def generate_image(
file: UploadFile, size: int = Form(...), format: str = Form("PNG")
):
if plugin is None or not plugin.enabled:
raise HTTPException(status_code=400, detail="插件未启用")
if size not in [16, 32, 48, 128]:
raise HTTPException(
status_code=400, detail="不支持的尺寸，仅支持 16, 32, 48, 128"
)
if format.upper() not in ["PNG", "JPEG", "WEBP"]:
raise HTTPException(
status_code=400, detail="不支持的格式，仅支持 PNG, JPEG, WEBP"
)
content_bytes = await file.read()
try:
image = Image.open(io.BytesIO(content_bytes))
if image.width < size or image.height < size:
raise HTTPException(
status_code=400,
detail=f"图片尺寸 ({image.width}x{image.height}) 小于请求尺寸 {size}x{size}",
)
resized = image.resize((size, size), Image.Resampling.LANCZOS)
output = io.BytesIO()
save_format = format.upper() if format.upper() != "JPEG" else "JPEG"
resized.save(output, format=save_format, quality=95)
output.seek(0)
content_type = {
"PNG": "image/png",
"JPEG": "image/jpeg",
"WEBP": "image/webp",
}.get(format.upper(), "image/png")
ext = {"PNG": ".png", "JPEG": ".jpg", "WEBP": ".webp"}.get(
format.upper(), ".png"
)
filename = f"icon{size}{ext}"
return Response(
content=output.read(),
media_type=content_type,
headers={"Content-Disposition": f'attachment; filename="{filename}"'},
)
except HTTPException:
raise
except Exception as e:
logger.error(f"生成图片失败: {e}")
raise HTTPException(status_code=400, detail=f"生成图片失败: {str(e)}")
|