apis for platform agnostic communication
TRANSCRIPT
@the_dead_poeticfb.com/pupprogrammingguild
github.com/[email protected]
APIs for Platform Agnostic Communication
APIs ?
a set of routines, protocols, and tools for building software applications [wikipedia]
code that allows two software programs to communicate with each other [techtarget]
defines the proper way for a developer to request services from that program [computer world]
APIs are…
Dirty stuff
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i386http://ref.x86asm.net/coder32.html
/* Setup cube vertex data. */v[0][0] = v[1][0] = v[2][0] = v[3][0] = -1;v[4][0] = v[5][0] = v[6][0] = v[7][0] = 1; v[0][1] = v[1][1] = v[4][1] = v[5][1] = -1; v[2][1] = v[3][1] = v[6][1] = v[7][1] = 1; v[0][2] = v[3][2] = v[4][2] = v[7][2] = 1; v[1][2] = v[2][2] = v[5][2] = v[6][2] = -1;
/* Enable a single OpenGL light. */ glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse); glLightfv(GL_LIGHT0, GL_POSITION, light_position); glEnable(GL_LIGHT0); glEnable(GL_LIGHTING);
/* Use depth buffering for hidden surface elimination. */ glEnable(GL_DEPTH_TEST);
/* Setup the view of the cube. */ glMatrixMode(GL_PROJECTION); gluPerspective( /* field of view in degree */ 40.0, /* aspect ratio */ 1.0, /* Z near */ 1.0, /* Z far */ 10.0); glMatrixMode(GL_MODELVIEW); gluLookAt(0.0, 0.0, 5.0, /* eye is at (0,0,5) */ 0.0, 0.0, 0.0, /* center is at (0,0,0) */ 0.0, 1.0, 0.); /* up is in positive Y direction */
OpenGL
#include <windows.h>
const char g_szClassName[] = "myWindowClass";
#define IDC_MAIN_EDIT 101
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam){
switch(msg){
case WM_CREATE:{
HFONT hfDefault;HWND hEdit;
hEdit = CreateWindowEx(WS_EX_CLIENTEDGE, "EDIT", "",
WS_CHILD | WS_VISIBLE | WS_VSCROLL | WS_HSCROLL | ES_MULTILINE | ES_AUTOVSCROLL | ES_AUTOHSCROLL,
0, 0, 100, 100, hwnd, (HMENU)IDC_MAIN_EDIT, GetModuleHandle(NULL), NULL);
if(hEdit == NULL)MessageBox(hwnd, "Could not create
edit box.", "Error", MB_OK | MB_ICONERROR);
hfDefault = (HFONT)GetStockObject(DEFAULT_GUI_FONT);
SendMessage(hEdit, WM_SETFONT, (WPARAM)hfDefault, MAKELPARAM(FALSE, 0));
}break;
Windows API
POST https://api.stripe.com/v1/charges
curl https://api.stripe.com/v1/charges \ -u sk_test_BQokikJOvBiI2HlWgH4olfQ2: \ -d amount=400 \ -d currency=usd \ -d source=tok_15doRS2eZvKYlo2C2ENn4JQh \ -d description="Charge for [email protected]"
{ "id": "ch_15e7rU2eZvKYlo2CxWE8afA9", "object": "charge", "created": 1425834404, "livemode": false, "paid": true, "status": "succeeded", "amount": 4996, "currency": "usd", "refunded": false, "source": { "id": "card_15e7rT2eZvKYlo2CXYAxysRN", "object": "card", "last4": "4242", "brand": "Visa", "funding": "credit", "exp_month": 12, "exp_year": 2018, "fingerprint": "Xt5EWLLDS7FJjR1c", "country": "US", "name": null, "address_line1": null, "address_line2": null, "address_city": null, "address_state": null, "address_zip": null, "address_country": null, "cvc_check": "pass", "address_line1_check": null, "address_zip_check": null, "dynamic_last4": null, "metadata": { }, "customer": "cus_5pnSCVpMBNlSrj" }, "captured": true, "balance_transaction": "txn_15bjRh2eZvKYlo2Ch4I6lxJ7", "failure_message": null, "failure_code": null, "amount_refunded": 0, "customer": "cus_5pnSCVpMBNlSrj", "invoice": null, "description": "Charge for DOC-AID consultation for Camden Remington", "dispute": null, "metadata": { }, "statement_descriptor": null, "fraud_details": { }, "receipt_email": null, "receipt_number": null, "shipping": null, "refunds": { "object": "list", "total_count": 0, "has_more": false, "url": "/v1/charges/ch_15e7rU2eZvKYlo2CxWE8afA9/refunds", "data": [
] }}
Web Services
(this is the s**t)
Why APIs?
LinuxAndroidWindowsAliens
Web Services
Intercommunication
RESTfula software architecture style consisting
of guidelines and best practices for creating scalable web services.
Client–serverStatelessCacheableLayered system
Requirements
Paypal/ Stripe (Billing) OpenStreetMaps [nomatim] (Geospatial
services) data.worldbank.org (everything)
Usage of APIs
Virtual Hands-onLet’s do this
Create an app that will record the number of clicks a user makes.
The client app should be able to record from mobile devices, and web.
We should be able to see how many clicks have been pressed.
Requirements
Client
Client
POST http://counter.dev/count
GET http://counter.dev/count API