data_download.py
6.6 KB
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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
# coding=utf-8
#author: 4N
#createtime: 2020/11/27
#email: nheweijun@sina.com
from app.models import *
import traceback
from osgeo.ogr import DataSource,Layer,FeatureDefn,FieldDefn,Feature
from osgeo import gdal,ogr
import os
import uuid
import configure
from app.util.component.ApiTemplate import ApiTemplate
from app.util.component.PGUtil import PGUtil
from app.util.component.ZipUtil import ZipUtil
class Api(ApiTemplate):
def process(self):
#获取参数
#返回结果
result={}
#设置编码
encoding = self.para.get("encoding")
if encoding:
gdal.SetConfigOption("SHAPE_ENCODING",encoding)
else:
gdal.SetConfigOption("SHAPE_ENCODING", "UTF-8")
ds:DataSource = None
try:
table_names = self.para.get("table_name").split(",")
database_guid = self.para.get("database_guid")
database = Database.query.filter_by(guid=database_guid).one_or_none()
if not database:
raise Exception("数据库不存在！")
ds:DataSource = PGUtil.open_pg_data_source(0,DES.decode(database.sqlalchemy_uri))
download_type = self.para.get("download_type")
data = None
if download_type.__eq__("shp"):
data = self.download_shp(table_names,ds)
if download_type.__eq__("gdb"):
data = self.download_gdb(table_names, ds,database_guid)
result["data"] = data
result["result"] = True
except Exception as e:
raise e
finally:
if ds:
ds.Destroy()
return result
def download_shp(self,table_names,ds):
data = []
for table_name in table_names:
url = self.download_one(ds, table_name)
data.append({"name": table_name, "download_url": url})
return data
def download_one(self,ds,table_name):
layer: Layer = ds.GetLayerByName(table_name)
driver = ogr.GetDriverByName("ESRI Shapefile")
uuid_ = uuid.uuid1().__str__()
parent = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
dirpath = os.path.join(parent, "file_tmp", uuid_)
os.makedirs(dirpath)
data_source: DataSource = driver.CreateDataSource(dirpath + "/{}.shp".format(table_name))
# data_source.CopyLayer(layer, table_name)
fid = layer.GetFIDColumn()
pg_layer: Layer = data_source.CreateLayer(table_name, layer.GetSpatialRef(), layer.GetGeomType())
schema = [sche for sche in layer.schema if not sche.name.__eq__(fid)]
pg_layer.CreateFields(schema)
layer.ResetReading()
for feature in layer:
pg_layer.CreateFeature(feature)
data_source.Destroy()
ZipUtil.create_zip(os.path.join(parent, "file_tmp", table_name+"_"+uuid_) + ".zip", [dirpath])
return "http://" + configure.deploy_ip_host + "/API/IO/Download/{}".format(table_name+"_"+uuid_ + ".zip")
def download_gdb(self,table_names,ds,database_guid):
ogr.RegisterAll()
data = []
gdal.UseExceptions()
gdal.SetConfigOption("GDAL_FILENAME_IS_UTF8", "YES")
# 创建一个gdb datasource
gdb_driver = ogr.GetDriverByName('FileGDB')
uuid_ = uuid.uuid1().__str__()
parent = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
gdb_path = os.path.join(parent, "file_tmp", uuid_+".gdb")
gdb_ds: DataSource = gdb_driver.CreateDataSource(gdb_path)
for table_name in table_names:
layer: Layer = ds.GetLayerByName(table_name)
table = Table.query.filter_by(name=table_name, database_guid=database_guid).one_or_none()
feature_defn: FeatureDefn = layer.GetLayerDefn()
for i in range(feature_defn.GetFieldCount()):
field_defn:FieldDefn = feature_defn.GetFieldDefn(i)
field_alias = Columns.query.filter_by(table_guid=table.guid,name=field_defn.GetName()).one_or_none().alias
field_defn.SetAlternativeName(field_alias)
table_alias= table.alias
# if is_chinese(table_name):
# if not table_alias:
# table_alias = table_name
# table_name = "table{}".format(table_name.__hash__())
fid = layer.GetFIDColumn()
pg_layer: Layer = gdb_ds.CreateLayer(table_name, layer.GetSpatialRef(), layer.GetGeomType(),["LAYER_ALIAS={}".format(table_alias)])
schema = [sche for sche in layer.schema if not sche.name.__eq__(fid)]
# schema = layer.schema
pg_layer.CreateFields(schema)
# gdb 不支持fid=0的要素，所以识别到后要+1
offset = 0
f1:Feature = layer.GetNextFeature()
if f1:
if f1.GetFID().__eq__(0):
offset = 1
layer.ResetReading()
for feature in layer:
feature.SetFID(feature.GetFID()+offset)
pg_layer.CreateFeature(feature)
# gdb_ds.CopyLayer(layer, table_name,["LAYER_ALIAS={}".format(table_alias)])
gdb_ds.Destroy()
ZipUtil.create_zip(gdb_path + ".zip", [gdb_path])
data.append({"name": ",".join(table_names), "download_url": "http://" + configure.deploy_ip_host + "/API/IO/Download/{}".format(uuid_+".gdb" + ".zip")})
return data
api_doc={
"tags":["IO接口"],
"description":"下载数据",
"parameters":[
{"name": "table_name",
"in": "formData",
"type":"string","description":"支持多图层下载，以逗号相隔","required":"true"},
{"name": "encoding",
"in": "formData",
"type": "string",
"enum":["GBK","UTF-8"]},
{"name": "download_type",
"in": "formData",
"type": "string",
"enum": ["shp", "gdb"],"required":"true"
},
{"name": "database_guid",
"in": "formData",
"type": "string","required":"true"
}
],
"responses":{
200:{
"schema":{
"properties":{
"content":{
"type": "string",
"description": "The name of the user"
}
}
}
}
}
}