image_wms.py
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# coding=utf-8
#author: 4N
#createtime: 2021/3/24
#email: nheweijun@sina.com
from app.util import *
import traceback
import numpy
from flask import Response
import random
from app.modules.service.image.models import ImageService
from app.util.component.ApiTemplate import ApiTemplate
from app.util.component.ParameterUtil import ParameterUtil
import json
from threading import Thread
from .util.ImageData import ImageData
from .util.Cache import Cache
from .util.Opencv import Opencv
class Api(ApiTemplate):
api_name = "WMS"
def process(self):
result = {}
parameter: dict = self.para
try:
parameter = ParameterUtil.to_lower(parameter)
self.guid = parameter.get("guid")
bbox = parameter.get("bbox")
width = int(parameter.get("width")) if parameter.get("width") else 256
height = int(parameter.get("height")) if parameter.get("height") else 256
image_type = parameter.get("format") if parameter.get("format") else "image/png"
quality = int(parameter.get("quality")) if parameter.get("quality") else 30
image_service_info, zoo, servers = Cache.cache_data(self.guid)
re = parameter.get("request")
if re and re.__eq__("GetCapabilities"):
return self.get_capabilities(image_service_info["service"])
# bands = [1, 2, 3]
extent = [float(x) for x in bbox.split(",")]
intersect_image = [im for im in image_service_info["images"] if self.determin_intersect(json.loads(im.extent),extent)]
if len(intersect_image)>1:
# 结果矩阵
empty_list = [numpy.zeros((height,width), dtype=int) + 65536,
numpy.zeros((height,width), dtype=int) + 65536,
numpy.zeros((height,width), dtype=int) + 65536]
pixel_array = numpy.zeros((height,width,3), dtype=int)
thread_list = []
for image in intersect_image:
#该影像的服务器，随机选取一个
image_servers = image.server.split(",")
image_servers = [ser for ser in image_servers if ser in servers]
if len(image_servers)>0:
indx = int(random.random() * len(image_servers))
image_server = image_servers[indx]
else:
image_server = "None"
bands = json.loads(image.band_view)
image_data = ImageData(image_server, image)
thread: MyThread = MyThread(image_data.get_data, args=(extent,bands,height,width))
thread.start()
thread_list.append(thread)
for thread in thread_list:
thread.join()
data = thread.get_result()
# 掩膜在中央接口生成,合图
mask = numpy.zeros((height,width), dtype=int)
mask2 = numpy.zeros((height,width), dtype=int)
jizhun = data[:, :, 0]
mask[jizhun == 65536] = 1
mask[jizhun != 65536] = 0
mask2[jizhun == 65536] = 0
mask2[jizhun != 65536] = 1
# 掩膜计算
for i, d in enumerate(empty_list):
empty_list[i] = empty_list[i] * mask + data[:, :, i] * mask2
for ii in [0, 1, 2]:
# opencv 颜色排序为GBR
pixel_array[:, :, 2 - ii] = empty_list[ii]
elif len(intersect_image)==1:
# 该影像的服务器，随机选取一个
image = intersect_image[0]
image_servers = image.server.split(",")
image_servers = [ser for ser in image_servers if ser in servers]
if len(image_servers) > 0:
indx = int(random.random() * len(image_servers))
image_server = image_servers[indx]
else:
image_server = "None"
bands = json.loads(image.band_view)
image_data = ImageData(image_server, image)
pixel_array_t = image_data.get_data(extent,bands,height,width)
pixel_array = numpy.zeros((height, width, 3), dtype=int)
for ii in [0, 1, 2]:
# opencv 颜色排序为GBR
pixel_array[:, :, 2 - ii] = pixel_array_t[:, :, ii]
else:
# 结果矩阵
pixel_array = numpy.zeros((height, width, 3), dtype=int)+65536
# 将图片生成在内存中,然后直接返回response
im_data = Opencv.create_image(image_type, pixel_array, quality)
if self.para.get("overview"):
return pixel_array
return Response(im_data, mimetype=image_type.lower())
except Exception as e:
print(traceback.format_exc())
result["state"] = -1
result["message"] = e.__str__()
return result
def determin_intersect(self, extent1, extent2):
if extent2[2] < extent1[0] or extent2[0] > extent1[2] or extent2[1] > extent1[
3] or extent2[3] < extent1[1]:
return False
else:
return True
def get_capabilities(self,image_service:ImageService):
xml = '''<?xml version="1.0" encoding="utf-8" ?>
<WMS_Capabilities version="1.2.0">
<Service>
<Name>WMS</Name>
<Title>{service_title}</Title>
<Abstract>{abstract}</Abstract>
<Keywords>GIMS</Keywords>
<OnlineResource/>
<Fees>none</Fees>
<AccessConstraints>none</AccessConstraints>
</Service>
<Capability>
<Request>
<GetCapabilities>
<Format>text/xml</Format>
<DCPType>
<HTTP>
<Get>
<OnlineResource xlink:href="{url}" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink"/>
</Get>
</HTTP>
</DCPType>
</GetCapabilities>
<GetMap>
<Format>png</Format>
<Format>jpeg</Format>
<Format>gif</Format>
<Format>image/png</Format>
<Format>image/jpeg</Format>
<Format>image/gif</Format>
<DCPType>
<HTTP>
<Get>
<OnlineResource xlink:href="{url}" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink"/>
</Get>
</HTTP>
</DCPType>
</GetMap>
<Map>
<Format>
<PNG/>
<GIF/>
<JPG/>
</Format>
<DCPType>
<HTTP>
<Get onlineResource="{url}"/>
</HTTP>
</DCPType>
</Map>
<Capabilities>
<Format>
<WMS_XML/>
</Format>
<DCPType>
<HTTP>
<Get onlineResource="{url}"/>
</HTTP>
</DCPType>
</Capabilities>
<FeatureInfo>
<Format>
<XML/>
<MIME/>
</Format>
<DCPType>
<HTTP>
<Get onlineResource="{url}"/>
</HTTP>
</DCPType>
</FeatureInfo>
</Request>
<Exception>
<Format>
<WMS_XML/>
<INIMAGE/>
<BLANK/>
</Format>
</Exception>
<Layer>
<Name>{service_name}</Name>
<Title>{service_title}</Title>
<CRS>{crs}</CRS>
<BoundingBox CRS="{crs}" maxx="{maxx}" maxy="{maxy}" minx="{minx}" miny="{miny}"/>
<Layer queryable="1">
<CRS>{crs}</CRS>
<Name>{layer_name}</Name>
<Title>{layer_title}</Title>
<BoundingBox CRS="{crs}" maxx="{maxx}" maxy="{maxy}" minx="{minx}" miny="{miny}"/>
</Layer>
</Layer>
</Capability>
</WMS_Capabilities>'''
extent = json.loads(image_service.extent)
xml = xml.format(service_title=image_service.name,
service_name=image_service.name,
abstract= "None" ,
crs="ESPG:4326",
layer_name=image_service.name,
layer_title=image_service.name,
maxx=extent[2],
maxy = extent[3],
minx = extent[0],
miny = extent[1],
url="http://{}/API/Service/Image/WMS?guid={}".format(configure.deploy_ip_host,image_service.guid))
r = Response(response=xml, status=200, mimetype="application/xml")
r.headers["Content-Type"] = "text/xml; charset=utf-8"
return r
api_doc = {
"tags": ["影像接口"],
"parameters": [
{"name": "guid",
"in": "query",
"type": "string"},
{"name": "bbox",
"in": "query",
"type": "string"},
{"name": "width",
"in": "query",
"type": "string"},
{"name": "height",
"in": "query",
"type": "string"},
{"name": "format",
"in": "query",
"type": "string"},
{"name": "quality",
"in": "query",
"type": "string"}
],
"responses": {
200: {
"schema": {
"properties": {
}
}
}
}
}
class MyThread(Thread):
def __init__(self,func,args=()):
super(MyThread,self).__init__()
self.func = func
self.args = args
def run(self):
self.result = self.func(*self.args)
def get_result(self):
try:
return self.result
except Exception:
return None