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  • REST API error return good practices

    - by Remus Rusanu
    I'm looking for guidance on good practices when it comes to return errors from a REST API. I'm working on a new API so I can take it any direction right now. My content type is XML at the moment, but I plan to support JSON in future. I am now adding some error cases, like for instance a client attempts to add a new resource but has exceeded his storage quota. I am already handling certain error cases with HTTP status codes (401 for authentication, 403 for authorization and 404 for plain bad request URIs). I looked over the blessed HTTP error codes but none of the 400-417 range seems right to report application specific errors. So at first I was tempted to return my application error with 200 OK and a specific XML payload (ie. Pay us more and you'll get the storage you need!) but I stopped to think about it and it seems to soapy (/shrug in horror). Besides it feels like I'm splitting the error responses into distinct cases, as some are http status code driven and other are content driven. So what is the SO crowd recommendation? Good practices (please explain why!) and also, from a client pov, what kind of error handling in the REST API makes life easier for the client code?

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  • How to clear a bean field with Stripes.

    - by Davoink
    In a JSP I have the following field: <stripes:text name="email"/> This field is in my action bean(snippet): public class CreateClaim implements ActionBean { private String email; public void setEmail(String email) { this.email = email; } public String getEmail() { return email; } public Resolution alc(){ email = "poodle"; return new ForwardResolution("aForward.jsp"); } } In the alc() methos I am setting email to be null. But when the pages renders the value of the email field is exactly as it was entered originally. Is there a way of clearing this field once and event has triggered? Cheers Dave

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  • Migrating master-slave MySQL database servers to 2 new servers, any tips or suggestions?

    - by mmattax
    I'm setting up 2 new database servers that will be replacing a current master-slave setup. All boxes are running / will be running MySQL on RHEL. Our current naming conventions: db1 - master database db2 - slave (using MySQL replication) db01 - new master db02 - new slave We need to get db01 to be the new master with db02 as the new slave. What is the best way to migrate db1 and db2 to db01 and db02? db1 and db2 are running in a production setting and we need to minimize all downtime; db1 has roughly 30GB of data in the database. Any suggestions or tips on how to migrate to our new servers would be much appreciated.

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  • MVC design question for forms

    - by kenny99
    Hi, I'm developing an app which has a large amount of related form data to be handled. I'm using a MVC structure and all of the related data is represented in my models, along with the handling of data validation from form submissions. I'm looking for some advice on a good way to approach laying out my controllers - basically I will have a huge form which will be broken down into manageable categories (similar to a credit card app) where the user progresses through each stage/category filling out the answers. All of these form categories are related to the main relation/object, but not to each other. Does it make more sense to have each subform/category as a method in the main controller class (which will make that one controller fairly massive), or would it be better to break each category into a subclass of the main controller? It may be just for neatness that the second approach is better, but I'm struggling to see much of a difference between either creating a new method for each category (which communicates with the model and outputs errors/success) or creating a new controller to handle the same functionality. Thanks in advance for any guidance!

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  • Understanding Async Methods in Web Service.

    - by Polaris
    Hello. I consume Java Service in my .NET appliaction. I have one question: When service serialize in .NET he also create Async methods. For example for GetPersons() method service create GetPersonsAsync() which is return void. In which cases I can use this Async methods and what the destination of these methods.

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  • RSH between servers not working

    - by churnd
    I have two servers: one CentOS 5.8 & one Solaris 10. Both are joined to my workplace AD domain via PBIS-Open. A user will log into the linux server & run an application which issues commands over RSH to the solaris server. Some commands are also run on the linux server, so both are needed. Due to the application these servers are being used for (proprietary GE software), the software on the linux server needs to be able to issue rsh commands to the solaris server on behalf of the user (the user just runs a script & the rest is automatic). However, rsh is not working for the domain users. It does work for a local user, so I believe I have the necessary trust settings between the two servers correct. However, I can rlogin as a domain user from the linux server to the solaris server. SSH works too (how I wish I could use it). Some relevant info: via rlogin: [user@linux~]$ rlogin solaris connect to address 192.168.1.2 port 543: Connection refused Trying krb4 rlogin... connect to address 192.168.1.2 port 543: Connection refused trying normal rlogin (/usr/bin/rlogin) Sun Microsystems Inc. SunOS 5.10 Generic January 2005 solaris% via rsh: [user@linux ~]$ rsh solaris ls connect to address 192.168.1.2 port 544: Connection refused Trying krb4 rsh... connect to address 192.168.1.2 port 544: Connection refused trying normal rsh (/usr/bin/rsh) permission denied. [user@linux ~]$ relevant snippet from /etc/pam.conf on solaris: # # rlogin service (explicit because of pam_rhost_auth) # rlogin auth sufficient pam_rhosts_auth.so.1 rlogin auth requisite pam_lsass.so set_default_repository rlogin auth requisite pam_lsass.so smartcard_prompt try_first_pass rlogin auth requisite pam_authtok_get.so.1 try_first_pass rlogin auth sufficient pam_lsass.so try_first_pass rlogin auth required pam_dhkeys.so.1 rlogin auth required pam_unix_cred.so.1 rlogin auth required pam_unix_auth.so.1 # # Kerberized rlogin service # krlogin auth required pam_unix_cred.so.1 krlogin auth required pam_krb5.so.1 # # rsh service (explicit because of pam_rhost_auth, # and pam_unix_auth for meaningful pam_setcred) # rsh auth sufficient pam_rhosts_auth.so.1 rsh auth required pam_unix_cred.so.1 # # Kerberized rsh service # krsh auth required pam_unix_cred.so.1 krsh auth required pam_krb5.so.1 # I have not really seen anything useful in either system log that seem to be directly related to the failed login attempt. I've tail -f'd /var/adm/messages on solaris & /var/log/messages on linux during the failed attempts & nothing shows up. Maybe I need to be doing something else?

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  • Is there an online user agent database?

    - by Gary Richardson
    How do you parse your user agent strings? I'm looking to get: Browser Browser Version OS OS Version from a user agent string. My app is written in perl and was previously using HTTP::BrowserDetect. It's a bit dated and is no longer maintained. I'm in no way tied to using perl for the actual lookup. I've come to the conclusion that automagic parsing is a lost cause. I was thinking of writing a crud type app to show me a list of unclassified UA's and manually keep them up to date. Does such an resource already exist that I can tap into? It would be awesome if I could make an HTTP call to look up the user agent info. Thanks!

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  • best way to switch between secure and unsecure connection without bugging the user

    - by Brian Lang
    The problem I am trying to tackle is simple. I have two pages - the first is a registration page, I take in a few fields from the user, once they submit it takes them to another page that processes the data, stores it to a database, and if successful, gives a confirmation message. Here is my issue - the data from the user is sensitive - as in, I'm using an https connection to ensure no eavesdropping. After that is sent to the database, I'd like on the confirmation page to do some nifty things like Google Maps navigation (this is for a time reservation application). The problem is by using the Google Maps api, I'd be linking to items through a unsecure source, which in turn prompts the user with a nasty warning message. I've browsed around, Google has an alternative to enterprise clients, but it costs $10,000 a year. What I am hoping is to find a workaround - use a secure connection to take in the data, and after it is processed, bring them to a page that isn't secure and allows me to utilize the Google Maps API. If any of you have a Netflix account you can see exactly what I would like to do when you sign-in, it is a secure page, which then takes you to your account / queue, on an unsecure page. Any suggestions? Thanks!

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  • Syncronizing multiple exchange servers 2007

    - by Mustafa Ismail Mustafa
    We're introducing a new exchange server for several reasons. After the introduction of the new server, and synchronizing it with the old one (mailboxes, contacts, rules, the whole shebang) we're going to be formatting the old machine, install XenServer 5.5 on it, and create a slices, one of which will have Exchange server, which again will need to be synchronized. Then, we'll have 2 different routes to the mail servers (mx1, mx2) so that if there is an outage on one, the other should be available. So now, I'm wondering how to synch? I can move a mailbox from one server to the other, and I'm sure that can be done in bulk, but that's not what I'm looking for. I'm looking to make both Servers equal, the first time so I can make a backup of the original, and the second time so that they can be made into peers. This is with Exchange 2007 on Windows 2008 R2 (x64) Suggestions? TIA

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  • Web based delivery pricing system - where to start?

    - by jsims281
    I've been asked to quote on how long it would take to deliver a system such as can be found here: http://cgi.tnt.co.uk/ratechecker/enter_details.asp The client basically wants to give quotes for shipping based on a number of variables such as weight, distance etc, and for it to be accessible through their website. I've thought of the Drupal/Ubercart/Shipping combination but this isn't really what it's designed for. A paid for, off-the-shelf system would also be great but I can't seem to find any that do this properly.. What would be a good system to start with here, or alternatively is there a system that already does this?

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  • Setting multiple SMTP settings in web.config?

    - by alphadogg
    I am building an app that needs to dynamically/programatically know of and use different SMTP settings when sending email. I'm used to using the system.net/mailSettings approach, but as I understand it, that only allows one SMTP connection definition at a time, used by SmtpClient(). However, I need more of a connectionStrings-like approach, where I can pull a set of settings based on a key/name. Any recommendations? I'm open to skipping the tradintional SmtpClient/mailSettings approach, and I think will have to...

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  • Applying the Windows Experience Index to Servers

    - by Scott
    I finally convinced upper management that we need a computer replacement plan, and I've been tasked with making an inventory of what we have and determining what needs to be replaced this year, next year, the year after, etc. I had to use some sort of criteria to back up my recommendations, so I decided to try using the Windows Experience Index. I've determined the CPU and Memory scores for all of our desktops and servers using community data. I also feel fairly successful in assigning a WEI score to each user based on their computing needs. I'm struggling with assigning a WEI score to the various servers that we have: file server, database server, Exchange server, backup server (for doing backups), web server. Suggestions would be appreciated.

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  • Web API Getting Http 500 error : Issue Solved See Below

    - by Joe Grasso
    Here is my MVC Controller and everything is fine: private UnitOfWork UOW; public InventoryController() { UOW = new UnitOfWork(); } // GET: /Inventory/ public ActionResult Index() { var products = UOW.ProductRepository.GetAll().ToList(); return View(products); } Same method call in API Controller gives me an Http 500 Error: private UnitOfWork _unitOfWork; public TestController() { _unitOfWork = new UnitOfWork(); } public IEnumerable<Product> Get() { var products = _unitOfWork.ProductRepository.GetAll().ToList(); return products; } Debugging shows that indeed there is data being returned in both controllers' UOW calls. I then added a customer configuration in Global: public static void CustomizeConfig(HttpConfiguration config) { config.Formatters.Remove(config.Formatters.XmlFormatter); var json = config.Formatters.JsonFormatter; json.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver(); } I am still receiving an Http 500 in API Controller ONLY and at a loss as to why. Any ideas? UPDATE: It appears using lazy loading caused the problem. When I set the associated properties to NON-VIRTUAL the Test API provided the necessary JSON string. However, whereas before I had the Vendor class included, I only have VendorId. I really wanted to included the associated classes. Any ideas? I know there are alot of smart people out there. Anyone?

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  • W2k8 RC1: Windows Media Servers (WMS) as proxy

    - by da_didi
    (fullquote from stackoverflow.com/questions/2690788/w2k8-rc1-windows-media-servers-wms-as-proxy/2690791#2690791) I will have one streaming-server (W2k8, unknown streaming protocol [rtsp, mss, http]) and half dozen streaming-servers as proxies to save bandwidth. I have read the documentation and installed the modules, but I am unsure how I have to configure the proxy's according to http://technet.microsoft.com/de-de/library/ee126142(en-us,WS.10).aspx - as a proxy or reverse proxy and how I minimize the bandwidth needs between origin server and proxy's. What is the best way to realize my setup? Any short how-tos? How can I announce all players to use the proxy? Route all rtsp/mms/http-requests through my proxy? Announce the proxy with DHCP-releases? Thanks!

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  • How has RIA Technology and what technology stack currently rules this domain ?

    - by Rachel
    I am new to RIA and have not been actively with this technology with all my projects as all of them we using server side Java Technology but I want to gain some experience with RIA and so my question is How has RIA Technology evolved and what technology stack currently rules this domain ? What are the recommended resources for learning RIA and in general what is the suggested approach to get started on RIA Journey ? Thanks.

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  • Public Facing Recursive DNS Servers - iptables rules

    - by David Schwartz
    We run public-facing recursive DNS servers on Linux machines. We've been used for DNS amplification attacks. Are there any recommended iptables rules that would help mitigate these attacks? The obvious solution is just to limit outbound DNS packets to a certain traffic level. But I was hoping to find something a little bit more clever so that an attack just blocks off traffic to the victim IP address. I've searched for advice and suggestions, but they all seem to be "don't run public-facing recursive name servers". Unfortunately, we are backed into a situation where things that are not easy to change will break if we don't do so, and this is due to decisions made more than a decade ago before these attacks were an issue.

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  • What exactly is a web application framework?

    - by isaiah
    I'm getting into python for cgi and came across Django. I'm not quite sure I understand it very much. Is it something I have to install inside apache or is it just something I can use with my cgi? Wanted to know because I'd love to learn it but my server I'm using doesn't give me a lot of privileges. thanks

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  • 'SSL not supported' when calling https web service in Ruby

    - by shaleo
    I am trying to run the following code to call a webservice from ruby but get an error 'SSL not supported'. I have httpclient 2.1.5.2 installed. require 'soap/wsdlDriver' def validate_certificate(is_ok, ctx) cert = ctx.current_cert unless (cert.subject.to_s == cert.issuer.to_s) #check the server certificate only is_ok &&= File.open(file_name).read == ctx.current_cert.to_pem end is_ok end def test_webservice wsdl = "https://.../service.wsdl" driver = SOAP::WSDLDriverFactory.new(wsdl).create_rpc_driver driver.options['protocol.http.ssl_config.verify_callback'] = method(:validate_certificate) driver.method(params) end

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  • Should a developer be a designer?

    - by nepb
    I have been developing websites for quite some time and I am not so good in designing websites? My Boss is refering me to take some lessons on it. But I really want to stick to development rather than designing?

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  • run two apache servers on one computer

    - by harry_T
    I would like to run two XAMPP apache servers and mysql on one Windows computer. My first idea was to run one under directory XAMPP, the other under XAMPP_B. Why you ask? I have two applications that have to be in the "root" directory of localhost. Both servers do not have to be active at same time, so I don't think I will have any conflicts I will have to modify my.cnf in mySQL httpd.conf, apache_start and maybe other config files as well. Or maybe someone can suggest a better way...

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  • nginx is not using gzip to talk to backend servers

    - by Michael Gorsuch
    Our web servers are running IIS 7 and are configured to compress dynamic and static content. When I hit these servers directly, gzip compression works. I recently placed nginx in front of them, and gzip compression has stopped. I was able to work around this by explicitly enabling gzip compression on nginx itself, but that seems a little inefficient considering I have half a dozen backends and only one active nginx box. It appears that nginx is stripping out the Accept-Encoding header. Does anyone have any advice for how to 'correct' this behavior? A sample configuration: upstream backend { server 127.0.0.1:8080; } server { listen 80; proxy_set_header Host $host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; location / { proxy_pass http://backend; } }

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