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如何通过服务器端和桌面编程使用REST API

字号:  小  中  大  | 打印 发布: 2009-6-02 15:48    作者: webmaster    来源: 本站原创    查看: 1314次

　　到目前为止，服务器端和桌面编程基本上都是使用SOAP Web服务。但是，REST风格的网络服务，由于其易于使用，已在服务器端和桌面开发中越来越受欢迎。服务器端和桌面编程的编程语言可以是Python,ASP.Net和Java。

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1．利用Python 当使用动态数据，Python语言非常适用于REST查询层，并找到所需的信息。下面的例子将查询所有信息层，并在控制台屏幕显示其所有属性：启动它，创建一个test.py文件包括下面的代码，然后从控制台窗口调用“python test.py”。ALL FOR GISY3m1TBj)z~#C

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import simplejson, urllib, sys, stringALL FOR GIS |E^D:r Ig

baseUrl =

{%m[\-W4x

"http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/3ALL FOR GISQb:T&y,|

/query?text=all&geometry=&geometryType=esriGeometryEnvelope&inSR=&spatialRel=esriSpatialRelIntersects

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&where=&returnGeometry=true&outSR=&outFields=&f=json"

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def loadJSON(url):ALL FOR GIS oG Y"XM/l/W%d

request = simplejson.load(urllib.urlopen(url))

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return requestALL FOR GIS7? `Nxs$z

results = loadJSON(baseUrl)['results']ALL FOR GISe$Z s v |%@

for result in results:ALL FOR GIS W:J&{0Y1?8ubTo)u5Z

print result['id'], result['name']ALL FOR GIS/J$H B)T%J

for attribute in result['attributes']:

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print attribute, result['attributes'][attribute]ALL FOR GIS"jx0{4^F _

print result['geometry']['x'], result['geometry']['y']

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printALL FOR GIS]'@ x9}:Y;~

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　　你还可以使用以下代码在HTML中找回信息来获得图像：ALL FOR GISOC1O)C~C

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import urllib, sys, string

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baseUrl = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/ALL FOR GIS H*l1xA8LLG ?

MapServer/export?bbox=-185.337909357176%2C15.2049923316373%2C-59.5254874993028%2C74.082485035617

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6&bboxSR=&layers=&layerdefs=&size=&imageSR=&format=png&transparent=false&dpi=&f=html"ALL FOR GISk/g p5{]sK"c?YL$^vL

request = urllib.urlopen(baseUrl).read()ALL FOR GISV9J F3k8L

print requestALL FOR GIS.VVLc9C*c`(a

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　　接下来，从ArcGIS Online下载扩展到HTML页面，包括影像和扩展属性。你就可以剪切和粘贴以下代码，执行代码将返回下列HTML文件：

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import urllib, sys, stringALL FOR GIS['} KFa T*c cmnJ

baseUrl =

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"http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/

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export?bbox=-185.337909357176%2C15.2049923316373%2C-59.5254874993028%2C74.0824850356176&bboxSR=

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&layers=&layerdefs=&size=&imageSR=&format=png&transparent=false&dpi=&f=html"ALL FOR GIS0y6JAs7{

request = urllib.urlopen(baseUrl).read()

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print requestALL FOR GIS3x(^|O/Op8d$@V `h

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　　返回如下HTML文件：ALL FOR GIS#W+Qi h#D&t~~6zc

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<html>ALL FOR GIS0V:yz C{L \

<head>

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<title>Export Map Image: Layers</title>

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<link href='/ArcGIS/rest/ESRI.ArcGIS.Rest.css' rel='stylesheet' type='text/css'>ALL FOR GIS eb_;}"g3{ a:l

</head>

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<body>

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<table width="100%" id="userTable">ALL FOR GIS;yLnF!n,b"U0A

<tr>

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<td id="titlecell">ArcGIS Services Directory</td>ALL FOR GISn y'qIW](Xv

</tr>ALL FOR GISY^u!W0}p j

</table>

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<table id="navTable" width="100%">ALL FOR GIS0t)~-^W5n

<tbody>

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<tr valign="top">ALL FOR GISI)}2L&it@T,C a

<td id="breadcrumbs">

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<a href="/ArcGIS/rest/services">Home</a> > <ahref="/ArcGIS/rest/services/Demographics">Demographics</a>ALL FOR GIS;r4y |%X*|5h/e

> <ahref="/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer">ESRI_Census_USA (MapServer)</

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a> </td>

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<td align="right" id="help">

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<a href="http://resources.esri.com/93beta/arcgisserver/apis/rest/servicesexplorer.html" target="_blank">Help</ALL FOR GIS&B%WBv$QKn+xb

a> | <a href="?f=help" target="_blank">API Reference</a></td>

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</tr>ALL FOR GIS Fi BUfK1d

</tbody>ALL FOR GIS0\&y"}#\T

</table>

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<div class='restHeader'>ALL FOR GIS;fS4tL.G

<h2>Export Map Image: Layers</h2>

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</div>ALL FOR GIS$lF:c|(N[

<div class='restBody'>ALL FOR GIS0J-m d2n9K,Vd

<table cellspacing="5" border="0">ALL FOR GIS/D,BHKz/\{!X

<tr valign="top">

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<td>ALL FOR GIS+[l&kt,sZB Hcl

<img style="background-color:#000000;border:2 solid #000000;" src="http://sampleserver1c.arcgisonline.com/

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arcgisoutput/_ags_map044294d2186345ca858301f585cd7aeb.png"/>ALL FOR GISH Ww:g[ X{![N

</td>ALL FOR GISD t+pNJ s6c3w

<td>

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Width: 400<br/>ALL FOR GISD!j5y(Q-b G:UO

Height: 400<br/>

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Extent:ALL FOR GIS$A4R3RU)E-| a$Ro X

<ul>

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XMin: -186.187993281927<br/>

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YMin: -19.11255617006<br/>

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XMax: -58.6754035745517<br/>

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YMax: 108.400033537315<br/>

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Spatial Reference: 4269<br/>

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<br/>

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</ul><br/>

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Scale: 133972136.331439<br/>ALL FOR GIS-s]:vSs Nf

</td>

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</tr>

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</table>

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<form>ALL FOR GISc@QY!Az*H8{ g

<table style="border:1px solid #000000;">

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</tr>ALL FOR GIS]X7J:NVu$cJ

<tr valign="top">ALL FOR GIS&e V3z` DH

<td>ALL FOR GISe0VZ ^[4PY

Bounding Box:</td>ALL FOR GIS h/KMq3y@ zq2U

<td><input type="text" name="bbox" value="-185.337909350544,-19.11255617006,-ALL FOR GISGv Tv8KcfVC e

59.5254875059344,108.400033537315" size="75"/></td>

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</tr>

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<tr valign="top">

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<td>ALL FOR GIS4Ct{ s#P1C%g;q o0Q

Bounding Box Spatial Reference (WKID):</td>ALL FOR GIS/Zqo'yx.q*^

<td><input type="text" name="bboxSR" value=""/></td>ALL FOR GIS8IHQY#I/K~WJ"y

</tr>ALL FOR GISl%^tG(Y#o7@su@.f

<tr valign="top">

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<td>ALL FOR GIS KHeF.p/QQ

Layers:</td>ALL FOR GIS_R(s L:B nG

<td><input type="text" name="layers" value=""/></td>

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</tr>ALL FOR GIS3k:Z5? J;dEV

<tr valign=ALL FOR GISl(N(z&CN4umB

"top">ALL FOR GISD5Z}].y`

<td>ALL FOR GIS3nTRY+d _4Q

Layer Definitions:</td>

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<td><input type="text" name="layerdefs" value="" size="75"/></td>

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</tr>

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<tr valign="top">

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<td>

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Image Size:</td>ALL FOR GIS9B!v2`Eh,[ B^(l%W

<td><input type="text" name="size" value=""/></td>ALL FOR GISgFf:rY/g

</tr>ALL FOR GIS+YL7cG&d SO

<tr valign="top">

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<td>ALL FOR GIS7ML ? C$D0EA'c0o

Image Spatial Reference (WKID):</td>

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<td><input type="text" name="imageSR" value=""/></td>

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</tr>

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<tr>

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<td>Image Format</td>

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<td>ALL FOR GIS,u6]\h C U%F

<select name="format">

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<option value="png" selected='true'>png</option>ALL FOR GIS#^~}cbi

<option value="png8">png8</option>ALL FOR GISnuH P+S _5Sw!R8m

<option value="png24">png24</option>ALL FOR GISS%V{PN S

<option value="jpg">jpg</option>ALL FOR GIS-kWAjP jG)q

<option value="pdf">pdf</option>ALL FOR GISh%_*r,P8D/M-ZNq

<option value="bmp">bmp</option>

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<option value="gif">gif</option>ALL FOR GIS/h1mA*V,A \ k @

<option value="svg">svg</option>ALL FOR GIST$m't'@I-Jc{O

</select>ALL FOR GIS g;y~vw!i~1oj&b

</td>ALL FOR GISq)W,n%g|(aw'yHy%z4l

</tr>

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<tr>ALL FOR GIS3{OF {s(h N]

<td>Background Transparent</td>ALL FOR GIS.YEOKhF3j

<td>ALL FOR GISfV"o1z v N"T

<input type="radio" name="transparent" value="true"/>Yes&nbsp;

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<input type="radio" name="transparent" value="false" checked='true'/>No</td>

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</tr>ALL FOR GIS~/k:fokd u2H

<tr valign="top">ALL FOR GIS LtO4Me^/I/T*Z w q

<td>ALL FOR GIS/|Tr crB

DPI:</td>

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<td><input type="text" name="dpi" value=""/></td>ALL FOR GISs*]"h8VPo K0[Dk

</tr>

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<tr>ALL FOR GIS5VO g\.A8^

<td>Format: </td>

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<td>

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<select name="f">ALL FOR GIS.{ [ X]CM

<option value="html" selected='true'>HTML</option>ALL FOR GISu(q4P,mSE{H Z

<option value="image">Image</option>ALL FOR GIS0v4sdX:]:L2ip

<option value="kmz">KMZ</option>

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<option value="pjson">JSON</option>

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</select>ALL FOR GISx"}m2R~)X-al,Z ]Ya

</td>ALL FOR GIS$G&a%{B\;mVcf

</tr>

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<tr><td colspan="2" align="left"><input type="submit" value="Export Map Image" /></td></tr>ALL FOR GISW7DR%R7x

</table>

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</form>ALL FOR GIS\.^5Tr PU

<br/>

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</div>ALL FOR GIS{4Zn*zg"G&q

</body>

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</html>

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,e0nBA j　　把上述代码保存为HTML，并在浏览器中打开，将会出现如下所示的HTML网页：

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#g;h~kVL%z

TAG: API REST 服务器

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  • 删除 引用 Guest (2009-10-26 10:53:54, 评分: 0 )

    c#代码有点问题吧
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