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'1'，路径参数，字符串\n",[1607,1701,1703,1705,1707,1709,1711,1713,1715,1718,1720,1723,1725,1727],{"class":1609,"line":1702},4,[1607,1704,1671],{"class":1620},[1607,1706,1625],{"class":1624},[1607,1708,1676],{"class":1628},[1607,1710,1632],{"class":1679},[1607,1712,1537],{"class":1620},[1607,1714,1625],{"class":1624},[1607,1716,1717],{"class":1620},"query",[1607,1719,1625],{"class":1624},[1607,1721,1722],{"class":1620},"keyword",[1607,1724,1658],{"class":1679},[1607,1726,1696],{"class":1624},[1607,1728,1729],{"class":1613}," // '张'，查询参数\n",[1607,1731,1733,1736,1738,1741,1743,1745,1748,1750,1752],{"class":1609,"line":1732},5,[1607,1734,1735],{"class":1620},"    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res.send('创建成功');\n});\n",[1535,1784,1785,1804,1810,1832,1836,1870,1894,1916],{"__ignoreMap":1603},[1607,1786,1787,1790,1793,1796,1799,1802],{"class":1609,"line":1610},[1607,1788,1789],{"class":1661},"const",[1607,1791,1792],{"class":1620}," app ",[1607,1794,1795],{"class":1624},"=",[1607,1797,1798],{"class":1628}," express",[1607,1800,1801],{"class":1620},"()",[1607,1803,1754],{"class":1624},[1607,1805,1806],{"class":1609,"line":1617},[1607,1807,1809],{"emptyLinePlaceholder":1808},true,"\n",[1607,1811,1812,1814,1816,1819,1822,1824,1827,1830],{"class":1609,"line":1668},[1607,1813,1621],{"class":1620},[1607,1815,1625],{"class":1624},[1607,1817,1818],{"class":1628},"use",[1607,1820,1821],{"class":1620},"(express",[1607,1823,1625],{"class":1624},[1607,1825,1826],{"class":1628},"json",[1607,1828,1829],{"class":1620},"())",[1607,1831,1754],{"class":1624},[1607,1833,1834],{"class":1609,"line":1702},[1607,1835,1809],{"emptyLinePlaceholder":1808},[1607,1837,1838,1840,1842,1845,1847,1849,1852,1854,1856,1858,1860,1862,1864,1866,1868],{"class":1609,"line":1732},[1607,1839,1621],{"class":1620},[1607,1841,1625],{"class":1624},[1607,1843,1844],{"class":1628},"post",[1607,1846,1632],{"class":1620},[1607,1848,1635],{"class":1624},[1607,1850,1851],{"class":1638},"/users",[1607,1853,1635],{"class":1624},[1607,1855,1644],{"class":1624},[1607,1857,1647],{"class":1624},[1607,1859,1537],{"class":1650},[1607,1861,1644],{"class":1624},[1607,1863,1655],{"class":1650},[1607,1865,1658],{"class":1624},[1607,1867,1662],{"class":1661},[1607,1869,1665],{"class":1624},[1607,1871,1872,1874,1876,1878,1880,1882,1884,1887,1889,1891],{"class":1609,"line":1757},[1607,1873,1671],{"class":1620},[1607,1875,1625],{"class":1624},[1607,1877,1676],{"class":1628},[1607,1879,1632],{"class":1679},[1607,1881,1537],{"class":1620},[1607,1883,1625],{"class":1624},[1607,1885,1886],{"class":1620},"body",[1607,1888,1658],{"class":1679},[1607,1890,1696],{"class":1624},[1607,1892,1893],{"class":1613}," // { name: '小明', age: 18 }\n",[1607,1895,1897,1899,1901,1903,1905,1907,1910,1912,1914],{"class":1609,"line":1896},7,[1607,1898,1735],{"class":1620},[1607,1900,1625],{"class":1624},[1607,1902,1740],{"class":1628},[1607,1904,1632],{"class":1679},[1607,1906,1635],{"class":1624},[1607,1908,1909],{"class":1638},"创建成功",[1607,1911,1635],{"class":1624},[1607,1913,1658],{"class":1679},[1607,1915,1754],{"class":1624},[1607,1917,1919,1921,1923],{"class":1609,"line":1918},8,[1607,1920,1760],{"class":1624},[1607,1922,1658],{"class":1620},[1607,1924,1754],{"class":1624},[1590,1926,1928],{"id":1927},"请求头-reqheaders-与-reqget","请求头 req.headers 与 req.get",[1531,1930,1931],{},"请求头记录了客户端的身份和环境信息，比如登录令牌 token、客户端类型。两种读取方式：",[1597,1933,1935],{"className":1599,"code":1934,"filename":1601,"language":1602,"meta":1603,"style":1603},"app.get('/profile', (req, res) => {\n    console.log(req.headers.token); // 方式一：属性访问，键名全小写\n    console.log(req.get('User-Agent')); // 方式二：get() 方法，大小写不敏感\n\n    res.send('ok');\n});\n",[1535,1936,1937,1970,1999,2032,2036,2056],{"__ignoreMap":1603},[1607,1938,1939,1941,1943,1945,1947,1949,1952,1954,1956,1958,1960,1962,1964,1966,1968],{"class":1609,"line":1610},[1607,1940,1621],{"class":1620},[1607,1942,1625],{"class":1624},[1607,1944,1629],{"class":1628},[1607,1946,1632],{"class":1620},[1607,1948,1635],{"class":1624},[1607,1950,1951],{"class":1638},"/profile",[1607,1953,1635],{"class":1624},[1607,1955,1644],{"class":1624},[1607,1957,1647],{"class":1624},[1607,1959,1537],{"class":1650},[1607,1961,1644],{"class":1624},[1607,1963,1655],{"class":1650},[1607,1965,1658],{"class":1624},[1607,1967,1662],{"class":1661},[1607,1969,1665],{"class":1624},[1607,1971,1972,1974,1976,1978,1980,1982,1984,1987,1989,1992,1994,1996],{"class":1609,"line":1617},[1607,1973,1671],{"class":1620},[1607,1975,1625],{"class":1624},[1607,1977,1676],{"class":1628},[1607,1979,1632],{"class":1679},[1607,1981,1537],{"class":1620},[1607,1983,1625],{"class":1624},[1607,1985,1986],{"class":1620},"headers",[1607,1988,1625],{"class":1624},[1607,1990,1991],{"class":1620},"token",[1607,1993,1658],{"class":1679},[1607,1995,1696],{"class":1624},[1607,1997,1998],{"class":1613}," // 方式一：属性访问，键名全小写\n",[1607,2000,2001,2003,2005,2007,2009,2011,2013,2015,2017,2019,2022,2024,2027,2029],{"class":1609,"line":1668},[1607,2002,1671],{"class":1620},[1607,2004,1625],{"class":1624},[1607,2006,1676],{"class":1628},[1607,2008,1632],{"class":1679},[1607,2010,1537],{"class":1620},[1607,2012,1625],{"class":1624},[1607,2014,1629],{"class":1628},[1607,2016,1632],{"class":1679},[1607,2018,1635],{"class":1624},[1607,2020,2021],{"class":1638},"User-Agent",[1607,2023,1635],{"class":1624},[1607,2025,2026],{"class":1679},"))",[1607,2028,1696],{"class":1624},[1607,2030,2031],{"class":1613}," // 方式二：get() 方法，大小写不敏感\n",[1607,2033,2034],{"class":1609,"line":1702},[1607,2035,1809],{"emptyLinePlaceholder":1808},[1607,2037,2038,2040,2042,2044,2046,2048,2050,2052,2054],{"class":1609,"line":1732},[1607,2039,1735],{"class":1620},[1607,2041,1625],{"class":1624},[1607,2043,1740],{"class":1628},[1607,2045,1632],{"class":1679},[1607,2047,1635],{"class":1624},[1607,2049,1747],{"class":1638},[1607,2051,1635],{"class":1624},[1607,2053,1658],{"class":1679},[1607,2055,1754],{"class":1624},[1607,2057,2058,2060,2062],{"class":1609,"line":1757},[1607,2059,1760],{"class":1624},[1607,2061,1658],{"class":1620},[1607,2063,1754],{"class":1624},[2065,2066,2067],"tip",{},[1531,2068,2069,2072,2073,2076,2077,2080],{},[1535,2070,2071],{},"req.headers"," 的键名会被统一转成小写，",[1535,2074,2075],{},"req.get('Token')"," 则不区分大小写。读单个请求头时，用 ",[1535,2078,2079],{},"req.get()"," 更省心。",[1544,2082],{},[1526,2084,2086],{"id":2085},"res控制响应内容","🛠 res：控制响应内容",[1590,2088,2090],{"id":2089},"ressend-与-resjson","res.send 与 res.json",[1531,2092,2093,2096,2097,2100],{},[1535,2094,2095],{},"res.send()"," 是通用的响应方法，",[1554,2098,2099],{},"它会根据传入的数据类型自动设置 Content-Type","：",[1597,2102,2104],{"className":1599,"code":2103,"filename":1601,"language":1602,"meta":1603,"style":1603},"app.get('/text', (req, res) => {\n    res.send('你好'); // 自动设置 text/html; charset=utf-8\n});\n\napp.get('/user', (req, res) => {\n    res.send({ name: '小明' }); // 自动转 JSON 并设置 application/json\n});\n",[1535,2105,2106,2139,2163,2171,2175,2208,2245],{"__ignoreMap":1603},[1607,2107,2108,2110,2112,2114,2116,2118,2121,2123,2125,2127,2129,2131,2133,2135,2137],{"class":1609,"line":1610},[1607,2109,1621],{"class":1620},[1607,2111,1625],{"class":1624},[1607,2113,1629],{"class":1628},[1607,2115,1632],{"class":1620},[1607,2117,1635],{"class":1624},[1607,2119,2120],{"class":1638},"/text",[1607,2122,1635],{"class":1624},[1607,2124,1644],{"class":1624},[1607,2126,1647],{"class":1624},[1607,2128,1537],{"class":1650},[1607,2130,1644],{"class":1624},[1607,2132,1655],{"class":1650},[1607,2134,1658],{"class":1624},[1607,2136,1662],{"class":1661},[1607,2138,1665],{"class":1624},[1607,2140,2141,2143,2145,2147,2149,2151,2154,2156,2158,2160],{"class":1609,"line":1617},[1607,2142,1735],{"class":1620},[1607,2144,1625],{"class":1624},[1607,2146,1740],{"class":1628},[1607,2148,1632],{"class":1679},[1607,2150,1635],{"class":1624},[1607,2152,2153],{"class":1638},"你好",[1607,2155,1635],{"class":1624},[1607,2157,1658],{"class":1679},[1607,2159,1696],{"class":1624},[1607,2161,2162],{"class":1613}," // 自动设置 text/html; charset=utf-8\n",[1607,2164,2165,2167,2169],{"class":1609,"line":1668},[1607,2166,1760],{"class":1624},[1607,2168,1658],{"class":1620},[1607,2170,1754],{"class":1624},[1607,2172,2173],{"class":1609,"line":1702},[1607,2174,1809],{"emptyLinePlaceholder":1808},[1607,2176,2177,2179,2181,2183,2185,2187,2190,2192,2194,2196,2198,2200,2202,2204,2206],{"class":1609,"line":1732},[1607,2178,1621],{"class":1620},[1607,2180,1625],{"class":1624},[1607,2182,1629],{"class":1628},[1607,2184,1632],{"class":1620},[1607,2186,1635],{"class":1624},[1607,2188,2189],{"class":1638},"/user",[1607,2191,1635],{"class":1624},[1607,2193,1644],{"class":1624},[1607,2195,1647],{"class":1624},[1607,2197,1537],{"class":1650},[1607,2199,1644],{"class":1624},[1607,2201,1655],{"class":1650},[1607,2203,1658],{"class":1624},[1607,2205,1662],{"class":1661},[1607,2207,1665],{"class":1624},[1607,2209,2210,2212,2214,2216,2218,2221,2224,2227,2230,2233,2235,2238,2240,2242],{"class":1609,"line":1757},[1607,2211,1735],{"class":1620},[1607,2213,1625],{"class":1624},[1607,2215,1740],{"class":1628},[1607,2217,1632],{"class":1679},[1607,2219,2220],{"class":1624},"{",[1607,2222,2223],{"class":1679}," name",[1607,2225,2226],{"class":1624},":",[1607,2228,2229],{"class":1624}," '",[1607,2231,2232],{"class":1638},"小明",[1607,2234,1635],{"class":1624},[1607,2236,2237],{"class":1624}," }",[1607,2239,1658],{"class":1679},[1607,2241,1696],{"class":1624},[1607,2243,2244],{"class":1613}," // 自动转 JSON 并设置 application/json\n",[1607,2246,2247,2249,2251],{"class":1609,"line":1896},[1607,2248,1760],{"class":1624},[1607,2250,1658],{"class":1620},[1607,2252,1754],{"class":1624},[1531,2254,2255,2256,2259,2260,2263],{},"回想原生 http 模块要手动 ",[1535,2257,2258],{},"setHeader"," 加 ",[1535,2261,2262],{},"JSON.stringify","，现在传什么都能正确处理，中文也不会乱码。",[1531,2265,2266,2267,2270,2271,2274],{},"返回 JSON 时，还可以用语义更明确的 ",[1535,2268,2269],{},"res.json()","，效果和 ",[1535,2272,2273],{},"res.send(对象)"," 一样：",[1597,2276,2278],{"className":1599,"code":2277,"filename":1601,"language":1602,"meta":1603,"style":1603},"app.get('/user', (req, res) => {\n    res.json({ name: '小明', age: 18 });\n});\n",[1535,2279,2280,2312,2351],{"__ignoreMap":1603},[1607,2281,2282,2284,2286,2288,2290,2292,2294,2296,2298,2300,2302,2304,2306,2308,2310],{"class":1609,"line":1610},[1607,2283,1621],{"class":1620},[1607,2285,1625],{"class":1624},[1607,2287,1629],{"class":1628},[1607,2289,1632],{"class":1620},[1607,2291,1635],{"class":1624},[1607,2293,2189],{"class":1638},[1607,2295,1635],{"class":1624},[1607,2297,1644],{"class":1624},[1607,2299,1647],{"class":1624},[1607,2301,1537],{"class":1650},[1607,2303,1644],{"class":1624},[1607,2305,1655],{"class":1650},[1607,2307,1658],{"class":1624},[1607,2309,1662],{"class":1661},[1607,2311,1665],{"class":1624},[1607,2313,2314,2316,2318,2320,2322,2324,2326,2328,2330,2332,2334,2336,2339,2341,2345,2347,2349],{"class":1609,"line":1617},[1607,2315,1735],{"class":1620},[1607,2317,1625],{"class":1624},[1607,2319,1826],{"class":1628},[1607,2321,1632],{"class":1679},[1607,2323,2220],{"class":1624},[1607,2325,2223],{"class":1679},[1607,2327,2226],{"class":1624},[1607,2329,2229],{"class":1624},[1607,2331,2232],{"class":1638},[1607,2333,1635],{"class":1624},[1607,2335,1644],{"class":1624},[1607,2337,2338],{"class":1679}," age",[1607,2340,2226],{"class":1624},[1607,2342,2344],{"class":2343},"smPcV"," 18",[1607,2346,2237],{"class":1624},[1607,2348,1658],{"class":1679},[1607,2350,1754],{"class":1624},[1607,2352,2353,2355,2357],{"class":1609,"line":1668},[1607,2354,1760],{"class":1624},[1607,2356,1658],{"class":1620},[1607,2358,1754],{"class":1624},[1590,2360,2362],{"id":2361},"resstatus-设置状态码","res.status 设置状态码",[1531,2364,2365,2368,2369,2371],{},[1535,2366,2367],{},"res.status()"," 设置状态码，它返回 ",[1535,2370,1541],{}," 本身，可以链式调用：",[1597,2373,2375],{"className":1599,"code":2374,"filename":1601,"language":1602,"meta":1603,"style":1603},"app.post('/users', (req, res) => {\n    // 创建资源成功，按规范返回 201\n    res.status(201).json({ message: '创建成功' });\n});\n\napp.get('/users/99', (req, res) => {\n    res.status(404).json({ message: '用户不存在' });\n});\n",[1535,2376,2377,2409,2414,2455,2463,2467,2500,2540],{"__ignoreMap":1603},[1607,2378,2379,2381,2383,2385,2387,2389,2391,2393,2395,2397,2399,2401,2403,2405,2407],{"class":1609,"line":1610},[1607,2380,1621],{"class":1620},[1607,2382,1625],{"class":1624},[1607,2384,1844],{"class":1628},[1607,2386,1632],{"class":1620},[1607,2388,1635],{"class":1624},[1607,2390,1851],{"class":1638},[1607,2392,1635],{"class":1624},[1607,2394,1644],{"class":1624},[1607,2396,1647],{"class":1624},[1607,2398,1537],{"class":1650},[1607,2400,1644],{"class":1624},[1607,2402,1655],{"class":1650},[1607,2404,1658],{"class":1624},[1607,2406,1662],{"class":1661},[1607,2408,1665],{"class":1624},[1607,2410,2411],{"class":1609,"line":1617},[1607,2412,2413],{"class":1613},"    // 创建资源成功，按规范返回 201\n",[1607,2415,2416,2418,2420,2423,2425,2428,2430,2432,2434,2436,2438,2441,2443,2445,2447,2449,2451,2453],{"class":1609,"line":1668},[1607,2417,1735],{"class":1620},[1607,2419,1625],{"class":1624},[1607,2421,2422],{"class":1628},"status",[1607,2424,1632],{"class":1679},[1607,2426,2427],{"class":2343},"201",[1607,2429,1658],{"class":1679},[1607,2431,1625],{"class":1624},[1607,2433,1826],{"class":1628},[1607,2435,1632],{"class":1679},[1607,2437,2220],{"class":1624},[1607,2439,2440],{"class":1679}," message",[1607,2442,2226],{"class":1624},[1607,2444,2229],{"class":1624},[1607,2446,1909],{"class":1638},[1607,2448,1635],{"class":1624},[1607,2450,2237],{"class":1624},[1607,2452,1658],{"class":1679},[1607,2454,1754],{"class":1624},[1607,2456,2457,2459,2461],{"class":1609,"line":1702},[1607,2458,1760],{"class":1624},[1607,2460,1658],{"class":1620},[1607,2462,1754],{"class":1624},[1607,2464,2465],{"class":1609,"line":1732},[1607,2466,1809],{"emptyLinePlaceholder":1808},[1607,2468,2469,2471,2473,2475,2477,2479,2482,2484,2486,2488,2490,2492,2494,2496,2498],{"class":1609,"line":1757},[1607,2470,1621],{"class":1620},[1607,2472,1625],{"class":1624},[1607,2474,1629],{"class":1628},[1607,2476,1632],{"class":1620},[1607,2478,1635],{"class":1624},[1607,2480,2481],{"class":1638},"/users/99",[1607,2483,1635],{"class":1624},[1607,2485,1644],{"class":1624},[1607,2487,1647],{"class":1624},[1607,2489,1537],{"class":1650},[1607,2491,1644],{"class":1624},[1607,2493,1655],{"class":1650},[1607,2495,1658],{"class":1624},[1607,2497,1662],{"class":1661},[1607,2499,1665],{"class":1624},[1607,2501,2502,2504,2506,2508,2510,2513,2515,2517,2519,2521,2523,2525,2527,2529,2532,2534,2536,2538],{"class":1609,"line":1896},[1607,2503,1735],{"class":1620},[1607,2505,1625],{"class":1624},[1607,2507,2422],{"class":1628},[1607,2509,1632],{"class":1679},[1607,2511,2512],{"class":2343},"404",[1607,2514,1658],{"class":1679},[1607,2516,1625],{"class":1624},[1607,2518,1826],{"class":1628},[1607,2520,1632],{"class":1679},[1607,2522,2220],{"class":1624},[1607,2524,2440],{"class":1679},[1607,2526,2226],{"class":1624},[1607,2528,2229],{"class":1624},[1607,2530,2531],{"class":1638},"用户不存在",[1607,2533,1635],{"class":1624},[1607,2535,2237],{"class":1624},[1607,2537,1658],{"class":1679},[1607,2539,1754],{"class":1624},[1607,2541,2542,2544,2546],{"class":1609,"line":1918},[1607,2543,1760],{"class":1624},[1607,2545,1658],{"class":1620},[1607,2547,1754],{"class":1624},[1590,2549,2551],{"id":2550},"resset-设置响应头","res.set 设置响应头",[1531,2553,2554,2555,2558],{},"需要自定义响应头时用 ",[1535,2556,2557],{},"res.set()","，比如告诉客户端允许缓存多久：",[1597,2560,2562],{"className":1599,"code":2561,"filename":1601,"language":1602,"meta":1603,"style":1603},"app.get('/config', (req, res) => {\n    res.set('Cache-Control', 'max-age=3600');\n    res.json({ theme: 'dark' });\n});\n",[1535,2563,2564,2597,2628,2658],{"__ignoreMap":1603},[1607,2565,2566,2568,2570,2572,2574,2576,2579,2581,2583,2585,2587,2589,2591,2593,2595],{"class":1609,"line":1610},[1607,2567,1621],{"class":1620},[1607,2569,1625],{"class":1624},[1607,2571,1629],{"class":1628},[1607,2573,1632],{"class":1620},[1607,2575,1635],{"class":1624},[1607,2577,2578],{"class":1638},"/config",[1607,2580,1635],{"class":1624},[1607,2582,1644],{"class":1624},[1607,2584,1647],{"class":1624},[1607,2586,1537],{"class":1650},[1607,2588,1644],{"class":1624},[1607,2590,1655],{"class":1650},[1607,2592,1658],{"class":1624},[1607,2594,1662],{"class":1661},[1607,2596,1665],{"class":1624},[1607,2598,2599,2601,2603,2606,2608,2610,2613,2615,2617,2619,2622,2624,2626],{"class":1609,"line":1617},[1607,2600,1735],{"class":1620},[1607,2602,1625],{"class":1624},[1607,2604,2605],{"class":1628},"set",[1607,2607,1632],{"class":1679},[1607,2609,1635],{"class":1624},[1607,2611,2612],{"class":1638},"Cache-Control",[1607,2614,1635],{"class":1624},[1607,2616,1644],{"class":1624},[1607,2618,2229],{"class":1624},[1607,2620,2621],{"class":1638},"max-age=3600",[1607,2623,1635],{"class":1624},[1607,2625,1658],{"class":1679},[1607,2627,1754],{"class":1624},[1607,2629,2630,2632,2634,2636,2638,2640,2643,2645,2647,2650,2652,2654,2656],{"class":1609,"line":1668},[1607,2631,1735],{"class":1620},[1607,2633,1625],{"class":1624},[1607,2635,1826],{"class":1628},[1607,2637,1632],{"class":1679},[1607,2639,2220],{"class":1624},[1607,2641,2642],{"class":1679}," theme",[1607,2644,2226],{"class":1624},[1607,2646,2229],{"class":1624},[1607,2648,2649],{"class":1638},"dark",[1607,2651,1635],{"class":1624},[1607,2653,2237],{"class":1624},[1607,2655,1658],{"class":1679},[1607,2657,1754],{"class":1624},[1607,2659,2660,2662,2664],{"class":1609,"line":1702},[1607,2661,1760],{"class":1624},[1607,2663,1658],{"class":1620},[1607,2665,1754],{"class":1624},[1590,2667,2669],{"id":2668},"resredirect-重定向","res.redirect 重定向",[1531,2671,2672],{},"让客户端跳转到另一个地址，常用于旧地址迁移：",[1597,2674,2676],{"className":1599,"code":2675,"filename":1601,"language":1602,"meta":1603,"style":1603},"app.get('/old-page', (req, res) => {\n    res.redirect('/new-page');\n});\n",[1535,2677,2678,2711,2733],{"__ignoreMap":1603},[1607,2679,2680,2682,2684,2686,2688,2690,2693,2695,2697,2699,2701,2703,2705,2707,2709],{"class":1609,"line":1610},[1607,2681,1621],{"class":1620},[1607,2683,1625],{"class":1624},[1607,2685,1629],{"class":1628},[1607,2687,1632],{"class":1620},[1607,2689,1635],{"class":1624},[1607,2691,2692],{"class":1638},"/old-page",[1607,2694,1635],{"class":1624},[1607,2696,1644],{"class":1624},[1607,2698,1647],{"class":1624},[1607,2700,1537],{"class":1650},[1607,2702,1644],{"class":1624},[1607,2704,1655],{"class":1650},[1607,2706,1658],{"class":1624},[1607,2708,1662],{"class":1661},[1607,2710,1665],{"class":1624},[1607,2712,2713,2715,2717,2720,2722,2724,2727,2729,2731],{"class":1609,"line":1617},[1607,2714,1735],{"class":1620},[1607,2716,1625],{"class":1624},[1607,2718,2719],{"class":1628},"redirect",[1607,2721,1632],{"class":1679},[1607,2723,1635],{"class":1624},[1607,2725,2726],{"class":1638},"/new-page",[1607,2728,1635],{"class":1624},[1607,2730,1658],{"class":1679},[1607,2732,1754],{"class":1624},[1607,2734,2735,2737,2739],{"class":1609,"line":1668},[1607,2736,1760],{"class":1624},[1607,2738,1658],{"class":1620},[1607,2740,1754],{"class":1624},[1531,2742,2743,2744,2746,2747,2749],{},"浏览器访问 ",[1535,2745,2692],{}," 会自动跳到 ",[1535,2748,2726],{},"。",[2751,2752,2753],"warning",{},[1531,2754,2755,2756,2758,2759,2761,2762,2765,2766,2769],{},"一个请求只能响应一次。",[1535,2757,2095],{}," 之后再调用 ",[1535,2760,2269],{}," 会报 ",[1535,2763,2764],{},"Cannot set headers after they are sent","，一个处理函数里记得用 ",[1535,2767,2768],{},"return"," 保证只走一个分支。",[1544,2771],{},[1526,2773,2775],{"id":2774},"调试接口的方式","🧰 调试接口的方式",[1531,2777,2778],{},"GET 接口直接用浏览器访问就行，POST、PUT、DELETE 可以在终端用 curl：",[1597,2780,2784],{"className":2781,"code":2782,"language":2783,"meta":1603,"style":1603},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","# 发送 JSON 的 POST 请求\ncurl -X POST http://localhost:3000/users -H \"Content-Type: application/json\" -d \"{\\\"name\\\":\\\"小明\\\"}\"\n\n# 带查询参数的 GET 请求\ncurl \"http://localhost:3000/users/1?keyword=张\"\n","bash",[1535,2785,2786,2791,2846,2850,2855],{"__ignoreMap":1603},[1607,2787,2788],{"class":1609,"line":1610},[1607,2789,2790],{"class":1613},"# 发送 JSON 的 POST 请求\n",[1607,2792,2793,2797,2800,2803,2806,2809,2812,2815,2818,2821,2823,2825,2828,2831,2833,2835,2837,2839,2841,2843],{"class":1609,"line":1617},[1607,2794,2796],{"class":2795},"sYGMc","curl",[1607,2798,2799],{"class":1638}," -X",[1607,2801,2802],{"class":1638}," POST",[1607,2804,2805],{"class":1638}," http://localhost:3000/users",[1607,2807,2808],{"class":1638}," -H",[1607,2810,2811],{"class":1624}," \"",[1607,2813,2814],{"class":1638},"Content-Type: application/json",[1607,2816,2817],{"class":1624},"\"",[1607,2819,2820],{"class":1638}," -d",[1607,2822,2811],{"class":1624},[1607,2824,2220],{"class":1638},[1607,2826,2827],{"class":1620},"\\\"",[1607,2829,2830],{"class":1638},"name",[1607,2832,2827],{"class":1620},[1607,2834,2226],{"class":1638},[1607,2836,2827],{"class":1620},[1607,2838,2232],{"class":1638},[1607,2840,2827],{"class":1620},[1607,2842,1760],{"class":1638},[1607,2844,2845],{"class":1624},"\"\n",[1607,2847,2848],{"class":1609,"line":1668},[1607,2849,1809],{"emptyLinePlaceholder":1808},[1607,2851,2852],{"class":1609,"line":1702},[1607,2853,2854],{"class":1613},"# 带查询参数的 GET 请求\n",[1607,2856,2857,2859,2861,2864],{"class":1609,"line":1732},[1607,2858,2796],{"class":2795},[1607,2860,2811],{"class":1624},[1607,2862,2863],{"class":1638},"http://localhost:3000/users/1?keyword=张",[1607,2865,2845],{"class":1624},[1531,2867,2868],{},"习惯图形界面的话，也可以用 Postman、Apifox 这类接口调试工具。",[2751,2870,2871],{},[1531,2872,2873],{},"接口调试工具的界面会不定期更新，按钮名称和入口位置可能与你看到的略有不同。工具只是发请求的手段，核心思路不变：选对请求方法、填对地址、设置好请求头和请求体，以你使用版本的实际界面为准。",[1544,2875],{},[1526,2877,2879],{"id":2878},"小节总结","🧾 小节总结",[1567,2881,2882,2903,2914,2919,2934],{},[1570,2883,2884,2886,2887,2890,2891,2894,2895,2897,2898,2900,2901,2749],{},[1535,2885,1537],{}," 承载客户端信息：路径参数 ",[1535,2888,2889],{},"req.params","、查询参数 ",[1535,2892,2893],{},"req.query","、请求体 ",[1535,2896,1778],{},"、请求头 ",[1535,2899,2071],{}," 和 ",[1535,2902,2079],{},[1570,2904,2905,2907,2908,2910,2911,2749],{},[1535,2906,1778],{}," 依赖 ",[1535,2909,1774],{}," 中间件解析，没加的话是 ",[1535,2912,2913],{},"undefined",[1570,2915,2916,2918],{},[1535,2917,2095],{}," 按数据类型自动设置 Content-Type，对象会自动转成 JSON。",[1570,2920,2921,2923,2924,2926,2927,2930,2931,2933],{},[1535,2922,2367],{}," 设状态码、",[1535,2925,2557],{}," 设响应头、",[1535,2928,2929],{},"res.redirect()"," 做跳转，",[1535,2932,2269],{}," 返回 JSON。",[1570,2935,2936],{},"一个请求只能响应一次，多次调用响应方法会报错。",[1544,2938],{},[1526,2940,2942],{"id":2941},"知识问答","❓ 知识问答",[1531,2944,2945],{},[1554,2946,2947],{},"Q1：res.send() 和 res.json() 有什么区别？",[1531,2949,2950,2951,2953,2954,2956,2957,2959],{},"传对象时两者效果相同，都返回 JSON。区别在于习惯：",[1535,2952,2269],{}," 语义更明确，",[1535,2955,2095],{}," 还能返回字符串、Buffer 等其他类型。返回数据接口用 ",[1535,2958,2269],{}," 更清晰。",[1531,2961,2962],{},[1554,2963,2964],{},"Q2：res.status(404) 后忘记 res.json() 会怎样？",[1531,2966,2967,2969,2970,2972,2973,2975,2976,2978],{},[1535,2968,2367],{}," 只设置状态码，不会结束响应。不写后续的响应方法，请求会一直挂着。记住：",[1535,2971,2367],{}," 后面必须接 ",[1535,2974,2269],{}," 或 ",[1535,2977,2095],{}," 等结束动作。",[1531,2980,2981],{},[1554,2982,2983],{},"Q3：req.query 里的数字要转类型吗？",[1531,2985,2986,2987,2989,2990,2993,2994,2997,2998,3001],{},"要。和 ",[1535,2988,2889],{}," 一样，查询参数的值也是字符串，",[1535,2991,2992],{},"?page=2"," 读出来是 ",[1535,2995,2996],{},"'2'","。参与数学计算前用 ",[1535,2999,3000],{},"Number()"," 转换。",[1531,3003,3004],{},[1554,3005,3006],{},"Q4：curl 里中文变成乱码怎么办？",[1531,3008,3009,3010,3013],{},"把请求地址里的中文做 URL 编码，或者用 ",[1535,3011,3012],{},"--data-urlencode"," 让 curl 帮你编码。这是 curl 客户端的编码问题，不影响 Express 本身的解析。",[1544,3015],{},[1526,3017,3019],{"id":3018},"小练习","🧪 小练习",[1531,3021,3022,3023,3026,3027,3029,3030,3033,3034,3036,3037,2749],{},"写一个 ",[1535,3024,3025],{},"GET /greet"," 接口：读取查询参数 ",[1535,3028,2830],{},"，如果有就返回 JSON ",[1535,3031,3032],{},"{ \"message\": \"你好，xxx\" }","；如果没有 ",[1535,3035,2830],{},"，返回状态码 400 和 ",[1535,3038,3039],{},"{ \"message\": \"请提供 name 参数\" }",[1597,3041,3043],{"className":1599,"code":3042,"filename":1601,"language":1602,"meta":1603,"style":1603},"import express from 'express';\n\nconst app = express();\n\n// 请在这里编写代码\n\napp.listen(3000);\n",[1535,3044,3045,3066,3070,3084,3088,3093,3097],{"__ignoreMap":1603},[1607,3046,3047,3051,3054,3057,3059,3062,3064],{"class":1609,"line":1610},[1607,3048,3050],{"class":3049},"s8pZq","import",[1607,3052,3053],{"class":1620}," express ",[1607,3055,3056],{"class":3049},"from",[1607,3058,2229],{"class":1624},[1607,3060,3061],{"class":1638},"express",[1607,3063,1635],{"class":1624},[1607,3065,1754],{"class":1624},[1607,3067,3068],{"class":1609,"line":1617},[1607,3069,1809],{"emptyLinePlaceholder":1808},[1607,3071,3072,3074,3076,3078,3080,3082],{"class":1609,"line":1668},[1607,3073,1789],{"class":1661},[1607,3075,1792],{"class":1620},[1607,3077,1795],{"class":1624},[1607,3079,1798],{"class":1628},[1607,3081,1801],{"class":1620},[1607,3083,1754],{"class":1624},[1607,3085,3086],{"class":1609,"line":1702},[1607,3087,1809],{"emptyLinePlaceholder":1808},[1607,3089,3090],{"class":1609,"line":1732},[1607,3091,3092],{"class":1613},"// 请在这里编写代码\n",[1607,3094,3095],{"class":1609,"line":1757},[1607,3096,1809],{"emptyLinePlaceholder":1808},[1607,3098,3099,3101,3103,3106,3108,3111,3113],{"class":1609,"line":1896},[1607,3100,1621],{"class":1620},[1607,3102,1625],{"class":1624},[1607,3104,3105],{"class":1628},"listen",[1607,3107,1632],{"class":1620},[1607,3109,3110],{"class":2343},"3000",[1607,3112,1658],{"class":1620},[1607,3114,1754],{"class":1624},[1544,3116],{},[1531,3118,3119],{},"🎉 恭喜你已经能熟练处理请求和响应了！下一篇我们学习错误处理，让服务器出错时也能优雅地回应客户端。",[3121,3122,3123],"style",{},"html pre.shiki code .syuKq, html code.shiki .syuKq{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html pre.shiki code .sndM8, html code.shiki .sndM8{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .s86vT, html code.shiki .s86vT{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .swgpB, html code.shiki .swgpB{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .sIEYB, html code.shiki .sIEYB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .sK9QF, html code.shiki .sK9QF{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}html pre.shiki code .s50WR, html code.shiki .s50WR{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .sd2Uz, html code.shiki .sd2Uz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .smPcV, html code.shiki .smPcV{--shiki-light:#F76D47;--shiki-default:#F78C6C;--shiki-dark:#F78C6C}html pre.shiki code .sYGMc, html code.shiki .sYGMc{--shiki-light:#E2931D;--shiki-default:#FFCB6B;--shiki-dark:#FFCB6B}html pre.shiki code .s8pZq, html code.shiki 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