The duration per evaluation of this free service is limited to 10 seconds. To try it, enter an expression below, then click the generated url. To try it, enter one or multiple expressions below, then click button "Evaluate". The expression must be url encoded.
Undefined by default. Response On success, the response will have status and the body contains the result of the expression. On failure, the response will have status with an error message in the body. Expression Url loading Response The response is a JSON object containing the following fields: Name Type Description result string, string, or null On success, the field result contains a string with the results of the expression.
If an array with expressions was provided, the result will be a an array with a string for each expression. On failure, result will be null. On success, error will be null. Try it To try it, enter one or multiple expressions below, then click button "Evaluate".
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It only takes a minute to sign up. When designing a RESTful interface, the semantics of the request types are deemed vital to the design. However, searches can be complex and it's entirely possible to produce a search that generates a long GET string. That is, referencing a SO question herethere are issues using GET strings longer than about characters. I may allow for searching on facets - "Technology", "Job Title", "Discipline" as well as free-text keywords, age of job, location and salary.
With a fluid user interface and a large number of technologies and job titles, it is feasible that a search could encompass a large number of facet choices. Tweak this example to CVs, rather than jobs, bring in even more facets, and you can very easily imagine a search with a hundred facets selected, or even just 40 facets each of which are 50 characters long e.
Semantically it may seem to make sense, but you're not actually creating anything, you're making a request for data. So, the question is - Trying to keep as true to RESTful design as possible, whilst ensuring that I'm keeping within the limitations of HTTP, what is the most appropriate design for a search?
You should not forget that GET requests have some superior advantages over other solutions:. Where "friendly" means that normally a GET request should not modify anything inside your application idempotent. This is the standard case for a search. These can be solved of course, but that's going to be another workaround, then another and another In extreme case you can even go for tactics like this google search where I set a lot of parameters still its a super short url.
Assuming you got so much options, its probable that you will need to store these searches as well and manage them, so its just clearing up your application. Personally I would try to fight with all my claws to get it done with a and when all hope is lost, I would crawl back with tears in my eyes to option b. I make a distinction between filtering the results from listing a collection vs a complex search. The litmus test I use is basically if I need more than filtering positive, negative, or range I consider it a more complex search requiring POST.
This tends to be reinforced when thinking about what will be returned. In a complex query I may be pulling from multiple resources in order to construct the response think SQL join so I won't be sending back URIs, but actual data.
The problem is the data will not be represented in a resource, so I will always have to return data. This seems to me a clear cut case of requiring a POST. GET is the intuitive choice for returning most kinds of data, collections of REST resources, structured data of a resource, even singular payloads images, docs, etc.
At this point I think simple searches, filtering do intuitively make sense through GET. Complex searches is up to personal preference especially if you are throwing in aggregation functions, cross correlations joinsre-formatters, etc.
I would argue the GET params should not get too long, and it a largish query however it's being structured can often make more sense as a POST request body. I also consider the experience aspect of API usage.
I generally want to make most of the methods as easy to use and intuitive as possible. In REST, resource definition is very broad. It's really however you want to bundle some data.
For example, the main Google URI points to a collection resource of "links to every site on the Internet".
Query parameters narrow that to the sites you want to see. People use them interchangably, though. Note that it's the same structure for the job object in each case.
A client can GET a collection of jobs, using query params to narrow the search, and then use the same format for one of the items to POST a new job. So if the call fails, middleware won't automatically retry or cache results, and 2 with the search parameters in the body, you can't cut and paste the URI anymore.My group has been studying ASP. Hence, this post. Whenever a client submits a request to a server, part of that request is an HTTP method, which is what the client would like the server to do with the specified resource.
HTTP methods represent those requested actions. For example, some commonly-used HTTP methods will retrieve data from a server, submit data to a server for processing, delete an item from the server's data store, etc. There are four HTTP methods that correspond to these actions, one for each, like so:.
We can tell from the name of the action and, let's be real, the comment that this action is supposed to create a movie. So we should use the POST verb on this action, like so:. However, there are a few other methods we could utilize if the need arises. Technically speaking, you could use either for the Create or Update scenarios, and in fact this is rather common. The difference lies in the details. PUT is idempotent. What this means is that if you make the same request twice using PUT, with the same parameters both times, the second request will have no effect.
This is why PUT is generally used for the Update scenario; calling Update more than once with the same parameters doesn't do anything more than the first call did. By contrast, POST is not idempotent; making the same call using POST with same parameters each time will cause two different things to happen, hence why POST is commonly used for the Create scenario submitting two identical items to a Create method should create two entries in the data store. However, doing so is liable to cause a horde of angry server admins to show up at your desk and beat you with ethernet cables.
Don't say I didn't warn you. If we do not assign an explicit HTTP method to a controller action, what method s does that action accept? Let's imagine we have a Web API controller like so:.
We can tell by looking at the code that this should be a GET action, since it is returning data. So, what method s will this action accept? Let's see what Postman can tell us.API gravity express the gravity or density of crude oil and liquid petroleum products. The measuring scale is calibrated in terms of degrees API. Oil with the least specific gravity has the highest API gravity. SG - Specific Gravity. Density is a temperature depedent property. API gravity increases with increasing temperature, while specific gravity decreases with increasing temperature.
See correlations at Density of crude oil as function of temperature. This means that the volume of a petroleum liquid increases with increasing temperature, and that a density number always must be given with the measurement temperature.
See also Standard test methods ASTM and others for crude oil propertiesand temperature correlations for lubricating oilfuel oils and jet fuel.
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Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Are these two queries the same? Like if your API say. If you do that you may got Method not allowed status. Generally in POST method you need to send the content in body with specified format which is described in content-type header for ex. And after that the request body gets deserialized at server end.
So you need to pass the serialized data from the client and it is decided by the service developer. But in general terms GET is used when server returns some data to the client and have not any impact on server whereas POST is used to create some resource on server. So generally it should not be same. The REST architectural style describes the following six constraints applied to the architecture, while leaving the implementation of the individual components free to design:.
For example, list all the cars for sale. PUT: Meaning defined as "replace the entire collection with another collection".POST request with Postman
The ID created is usually included as part of the data returned by this operation. If you were writing a plain old RPC API call, they could technically interchangeable as long as the processing server side were no different between both calls.
However, in order for the call to be RESTful, calling the endpoint via the GET method should have a distinct functionality which is to get resource s from the POST method which is to create new resources.
Side note: there is some debate out there about whether or not POST should also be allowed to be used to update resources Security is like an onion; many layers and makes us cry! Think about it. When your client makes a GET request to an URI X, what it's saying to the server is: "I want a representation of the resource located at X, and this operation shouldn't change anything on the server. REST relies on the standardized behavior of the underlying protocol, and POST is precisely the method used for an action that isn't standardized.NET platform to be consumed by desktop or mobile clients.
For security reasons, web pages cannot make calls to services APIs on a domain other than the one where the page originated. Please refer to the MSDN documentation for details on this. I am using Visual Studio Express for Desktop as my development environment targeting.
NET framework 4. Just a brief on the above code, we have five HTTP GET methods, as the name says these methods just deliver basic mathematical operations. Add the below code in WebApiConfig. Here, I will be creating the client inside the API project itself. You are free to create a separate client project.
Optionally, you can load the JQuery script file from a content delivery network CDN server as a best practice.
Now our solution explorer looks as below:. Now our client interface is ready to consume the web API services. We have two input fields and buttons to invoke the API services. To test the client, hit F5 or whatever you have configured your debug key in Visual Studio and our API services are ready to be consumed. Input some numeric values to the input text boxes. Then click on the respective button to invoke the API services.
The output will be displayed in the output text area. You can create a separate project for client and consume it.Times are based on predictive traffic information, depending on the start time specified in the request. Distance matrices can be calculated for driving, walking and public transit routes. This API can also generate distance matrices that optionally includes a histogram of travel times over a period of time with a set interval that takes into consideration the predicted traffic at those times.
Distance matrices are used in several different types of applications. Some other common applications include:. When you make a request by using one of the following URL templates, the response returns a Distance Matrix resource that contains either an array of Distance Matrix cells or information on the asynchronous request that was made to calculate a distance matrix.
Each distance matrix cell contains the location and index of the origin and destination it is related to, the travel time, and distance.
If a distance matrix histogram is requested, a departure time for when in the histogram the cell it is related to will be included. You can also view the example URL and response values in the Examples section. A distance matrix can be requested that has up to origins-destinations pairs which is calculated by multiplying the number of origins, by the number of destinations.
What is REST?
For example, you can have 1 origin, and destinations, or 50 origins and 50 destinations. A histogram of travel times and distances can be requested but is limited to a distance matrix that has a maximum of origins-destinations pairs when the request is made asynchronously, and 10 origins-destinations pairs when made synchronously.
The maximum time interval between the start and end time when calculating a distance matrix histogram is 24 hours. Note that transactions are based on the total number of cells in the resulting matrix and not on the number of requests, so the same number of transactions would be generated if you make two requests that generate cells each or 1 request that generates cells.
See Asynchronous Requests documentation. When calculating a simple distance matrix each origin-destination pair will generate a single cell in the matrix. When a matrix includes a histogram, each origin-destination pair will have a cell in the matrix for each time interval.
The number of time intervals that a request will have depends on the resolution, start and end times.
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Cells will not be generated for origin-destination pairs that have the same index and coordinate. These will not be included in the transaction counts. If these exist in your query, you can subtract these from the calculated number of cells above to get a more accurate number for estimating transaction counts.
A billable transaction is generated for every 4 cells in a matrix, rounded up to the nearest whole integer.
For a simple matrix, billable transactions will be calculated using the following formula:. For example, a matrix that has 2 origins, and 5 destinations, will generate 3 billable transactions where Ceiling 0.
When calculating a matrix which includes a histogram, only the first 30 time intervals in each origin-destination pair are counted towards billable transactions, any additional time intervals are provided for free. However, browsers and servers have limits on the maximum length that URLs can be.
Typically, it is best to keep your URLs under characters in length. With this in mind, it is recommended to only use HTTP GET requests when your request has less than a total of 50 origins and destinations. Creates a job to calculate a distance matrix using an asynchronous GET request. This type of request is only supported when the travel mode is set to driving.
A start time must be specified when making asynchronous requests. Creates a job to calculate a distance matrix using an asynchronous POST request. The initial asynchronous response includes a callbackUrl property which contains the URL that can be used to check the status of the job.
Alternatively, the callback URL can also be generated by appending the requestId that is returned in the initial asynchronous request along with the same Bing Maps key used, with the DistanceMatrixAsyncCallback endpoint as shown below.
The response from this request will indicate if the request is complete or not, if complete it will provide a resultUrl property which is a URL that can be used to download the results. Geocode your origins and destinations ahead of time and store that information if you plan to use those locations in future requests.