[英]How to permit access to a different port?
The Amber Smalltalk IDE works with a server written in nodejs. Amber Smalltalk IDE可与用nodejs编写的服务器一起使用。 How can I configure the server that XMLHttpRequests going to a different port of the same domain are allowed?
如何配置允许XMLHttpRequests进入同一域的不同端口的服务器?
The default access to Amber is 琥珀色的默认访问权限是
http://127.0.0.1:4000/
And to retrieve and store JSON data I want to use a couchDB instance (default port is 5984) 并要检索和存储JSON数据,我想使用ouchDB实例(默认端口为5984)
| req | req := XMLHttpRequest new. req open: 'GET' url: 'http://127.0.0.1:5984/' asynchronous: false. req send: ''.
The problem 问题
Access is not possible because of cross-domain access policy. 由于跨域访问策略,因此无法访问。
Notes 笔记
The server is called from 服务器从
amber-master\bin\server.bat
The server is in 服务器在
amber-master\cli\js\amber-cli.js
The client is Firefox which should allow that the XMLHttpRequest objects may access a different port provided the server indicates this with an 'Access-Control-Allow-Origin header'. 客户端是Firefox,它应该允许XMLHttpRequest对象可以访问其他端口,前提是服务器使用“ Access-Control-Allow-Origin标头”进行指示。
References 参考
http://www.w3.org/TR/cors/#access-control-allow-origin-response-header http://www.w3.org/TR/cors/#access-control-allow-origin-response-header
CouchDB cross-domain access from XMLHttpRequest? 来自XMLHttpRequest的CouchDB跨域访问?
After answer by MKroenert 在MKroenert回答之后
I upgraded to version 1.4.0 of CouchDB and adapted the local.ini file to allow for CORS (C:\\Program Files\\Apache Software Foundation\\CouchDB\\etc\\couchdb\\local.ini) 我升级到1.4.0版的CouchDB,并修改了local.ini文件以允许CORS(C:\\ Program Files \\ Apache Software Foundation \\ CouchDB \\ etc \\ couchdb \\ local.ini)
[httpd]
enable_cors = true
[cors]
origins = *
More on http://wiki.apache.org/couchdb/CORS In particular how to limit access. 有关http://wiki.apache.org/couchdb/CORS的更多信息,特别是如何限制访问。
3.12.1. 3.12.1。 Enabling CORS http://docs.couchdb.org/en/latest/configuring.html
启用CORS http://docs.couchdb.org/en/latest/configuring.html
Then after restarting the couchDB service the following code snippet works fine in an Amber Smalltalk workspace 然后,在重新启动CouchDB服务之后,以下代码段在Amber Smalltalk工作区中可以正常工作
| req colordict mimeType |
colordict := HashedCollection new.
colordict at: 'red' put: 'rot'.
colordict at: 'blue' put: 'blau'.
colordict at: 'yellow' put: 'gelb'.
req := XMLHttpRequest new.
req open: 'PUT'
url: 'http://localhost:5984/components/test2' asynchronous: false.
mimeType :='application/json'.
req setRequestHeader: 'Content-Type' mimeType: mimeType.
req send: (JSON stringify: colordict).
req responseText
A 'printit' gives back “ printit”回馈
'{"ok":true,"id":"test2","rev":"1-8d2356ebdbabdd87a35e0ae3b137bdb5"}
'
If I understand your problem correctly you try to access a resource on 127.0.0.1:5984
from within an Amber program. 如果我正确理解了您的问题,则尝试从Amber程序中访问
127.0.0.1:5984
上的资源。
Since it is not mentioned in the question there are two possible cases in this question: 由于问题中未提及,因此该问题有两种可能的情况:
A non Amber server is running on port 5984
. 非琥珀色服务器正在端口
5984
上运行。
In this case it is the responsibility of the specific server running on port 5984
to provide the Access-Control-Allow-Origin: *
header and is not a problem with the Amber server. 在这种情况下,端口
5984
上运行的特定服务器有责任提供Access-Control-Allow-Origin: *
标头,而Amber服务器则不成问题。
Another Amber server is running on port 5984
. 另一台Amber服务器正在端口
5984
上运行。
In this case we do not currently implement sending the Access-Control-Allow-Origin: *
header. 在这种情况下,我们当前不实现发送
Access-Control-Allow-Origin: *
标头。 The Amber server is meant to be a simple development server and should not be used for deployment. Amber服务器是作为简单的开发服务器,不应用于部署。
However, if there is a specific use-case where sending this header is necessary we can discuss this on the Amber mailinglist or create an issue on the GitHub tracker and mark it as a feature request. 但是,如果有特定的用例需要发送此标头,我们可以在Amber邮件列表上进行讨论,或在GitHub跟踪器上创建问题,并将其标记为功能请求。
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